equiformity 
The heavens admit not these sinister and dexter re- 
spt-t-ts ; there being in them no diversity or difference, but 
1084 
evenly balanced, + -ist.~] 
equinoctial 
One who balances equilibrium : valve (e-kwi-lib'ri-um-valv), . 
equally; one who practises balancing in unnat- A valve having nearly equal pressure on botli 
a simplicity of parts and eauiioi-mit!, in motion continual- J , , )ofe : itious all d hazardous movements, as a sides, to enable it to be easily worked. 
tch Other. Su-T. limime, Vulg. Err., iv. 5. ura* w _il.iv-.| //l-_j isv,J\ r/ T ,,,, 10 nr,,,ol 
rone-dancer or funambulist. equilODed (e Kwi-lor>a), a. l\ Li. a'quus, equal, 
[< LL. 
ly succeeding eaa 
equilateral (e-kwi-lat'e-ral), a. and n. 
a'qiiilateralis, < L. aquas, equal, + 
latus (later-), side.] I. a. 1. In 
geom., having all the sides equal: 
as, an equilateral triangle. 2. 
In zodl. : (a) Having the two 
sides equal : said of surfaces 
which can be divided into two 
parts of the same form by a 
longitudinal median line. (6) Having all the 
eq 
+ NL. lobus, lobe, 
equal lobes. 
+ -ed 2 .] In lot., having 
Equilateral Tri- 
angle. 
rope-dancer or funambulist. 
A monkey has lately performed, . . . both as a rope- 
dancer and an equilibrist, such tricks as no man was 
thought equal to before the Turk appeared in England. 
Granger, quoted in Strutt's Sports and Pastimes, p. b07. 
The case of the equilibrist and rope-dancer ... is par- 
ticularly favourable to this explanation. Duyald Stewart. 
equilibrity (e-kwi-lib'ri-ti), n. [< L. cequilibri- 
ta(t-)s, < (Bquilibris, evenly balanced: see eqiti- Mi ,_^_. 
tibrium.] The state of being equally balanced; equimultiple (e-kwi-mul'ti-pl), a. and n. [= 
balance on both sides; equilibrium; j,\ equimultiple = It. eqmniultijtlicr, < L. aq 
equimomental (e"kwi-mo-men'tal), a. [< L. 
uquus, equal, + momentum, moment, + -al.] In 
physics, having equal moments of inertia about 
parallel axes, or axes which may be brought 
into parallelism, all at once Equimomental el- 
lipsoid. See ellipsoid. 
equal balance on both sides; equilibrium; },\ equimultiple = It. equimultiplicc, < L. a-quut, 
sides equal, (c) Having all the convolutions equipoise: as, the theory of equilibrity. equal, + multiplex (-plic-), multiple : see multi- 
of the shell in one plane : said chiefly of fora- equilibrium (e-kwi-lib'ri-um), n. [Formerly pie.'] I. a. Produced by multiplication by the 
minifers. Equilateral bivalve, a shell in which a 
transverse line, drawn through the apex of the umbo of 
either of the valves, bisects the valve into t\vo equal and 
symmetrical parts. Equilateral hemianopsia, hy- 
perbola, prism, etc. See the nouns. =Syn. 2. Hgtalat- 
Krai, Eiiuivalw. In conch., an equilateral bivalve has one 
half of each valve of the same size and shape as the other 
half of the same valve ; an equimloe bivalve has each valve 
shaped like the other one. 
II. n. A figure having all its sides equal. 
also (.equilibrium; = P. fquilibre = Sp. ecuili- 
brio = Pg. It. equilibria, < L. (equilibrium, an 
even balance, a horizontal position, < ccquili- 
bris, level, horizontal, evenly balanced, < cequvs, 
equal, + libra, a balance: see libra.'} 1. Equi- 
poise; the state of being equally balanced; a 
situation of a body in which the forces acting 
on it balance one another; also, a determina- 
equilaterally (e-kwi-lat'e-ral-i), adv. I. With tion of forces such that they balance one an- 
?n i . _ i *_ i n *_" '} . /~\ -c- 11.. other, so that thf'ir resultant vanishes. Thus. 
all the sides equal. 2. In zodl. : (a) Equally 
on two sides : as, equilaterally rounded ; equi- 
laterally bisinuate. (b) So as to have two sides 
equal: as, equilaterally produced; equilaterally 
angulose. 
equilibrant (e-kwi-ll' brant), n. [< L. as if 
*wquilibran(t-)s, ppr. of *a>quilibrare, balance 
' 
equally : see equilibrate,'} In physics, a system rope may act in the same vertical line, 
of forces which would bring another given sys- i "" 1 "" 1v 
tern of forces to equilibrium. 
same number or quantity ; divisible by the same 
number or quantity. 
II. .. In arith. and geom., one of two or more 
numbers or quantities produced by multiplying 
other numbers or quantities by the same num- 
ber or quantity; one of two or more numbers 
or quantities divisible by the same number or 
quantity: as, wA, wB are equimultiples of A 
and 13. Equimultiples are always in the same ratio to 
each other as the numbers or quantities multiplied. If 6 
and 9 are each multiplied by 4, the equimultiples 24 and 
36 will be to each other as to 6. 
equinalt (e-kwi'nal), a. [ME. equina.ll; as equine 
+ -al.] Same as equine. [Bare.] 
Chalchas devisde the high enuinall pile, 
That his huge vastnesse might all entrance bar. 
Heyu'oud, Troia Britannica (1609). 
^ 1 ht' a i' 1 d > the < a ' fiQUi 110 (e'kwin or -kwin), a. and n. [< L. egui- 
buoyancy of the liquid a g re exactly Iqual nus, pertaining to a horse, < S^_J^?J,W 
other, so that their resultant vanishes. Thus, 
when a heavy body rests on a table, the weight and the 
elastic forces which the weight evokes are in equilibrium 
(a phrase often used in the Latin form in cequilibrio, or 
more commonly in equilibria) that is, are precisely equal 
and opposite; thus, a man walking a tight-rope usually 
carries a pole or balancing-rod to aid him in preserving 
his equilibrium that is, in keeping his center of gravity 
over the rope, so that his weight and the spring of the 
" lline. Similarly, a float- 
its weight and the up- 
Any system of forces which if applied to a rigid body 
would balance a given system of forces acting on it is 
called an equilibrant of the given system. 
Thai/nan ami Tait, Tfat. Phil., 558. 
equilibrate (e-kwi-li'brat), v. t. ; pret. and pp. 
equilibrated, ppr. equilibrating. [< LL. cequili- 
bratus (adj., equiv. to (equilibria: see equilib- 
rium), pp. of *oiquilibrare (> It. equilibrare = 
Sp. Pg. cquilibrar = F. cquilibrer), balance 
equally, < L. (equus, equal, + librare, balance, 
poise: see librate.~\ To balance equally ; keep 
even with equal weight on each side ; keep in 
equipoise. 
The bodies of fishes are equilibrated with the water in 
which they swim. Arbuthnot, Effects of Air. 
Here, as wherever there are antagonistic actions, we 
see rhythmical divergences on opposite sides of the medi- 
um state changes which equilibrate each other by their 
alternate excesses. //. Spencer. 
equilibration (e"kwi-H-bra'shon), n. [= Sp. 
equilibration = Pg. equilibraqao = It. equili- 
brations; as equilibrate + -ion.] Equipoise; 
the act of keeping the balance even ; the state 
of being equally balanced ; the maintenance of 
equilibrium. 
In so great a variety of motions, as running, leaping, 
and dancing, nature's laws of equilibration are observed. 
Sir J. Denhain. 
Considered in the widest sense, the processes which we 
have seen to cooperate in the evolution of organisms are 
all processes of equilibration or adjustment. 
J. Fixke, Cosmic Philos., II. 64. 
equilibratory (e-kwi-li'bra-to-ri), a. [< equi- 
librate + -on/.] Tending' or serving to equi- 
librate or balance : as, equilibratory action. 
Jevons. 
equilibret, >* [X F. fquilibre, < L. ^equilibrium, 
an even balance: see equilibrium.'] Equilib- 
rium. [Rare.] 
It is by the equilibre of the muscles . . . that the head 
maintains its erect posture. Paley, Nat. Theol., ix. 
equilibrial (e-kwi-lib'ri-al), a. [< L. (equili- 
bria, evenly balanced, -f -al.~] Pertaining to 
equilibration. 
equilibrioust (e-kwi-lib'ri-us), a. [< L. cequi- 
libris, evenly balanced, + -OKS.] Being in a 
state of equilibrium or equipoise ; balanced. 
Our rational and sensitive propensions are made in snch 
a regular and cquilibriout order that, proportiouably as 
the one does increase in activity, the other always decays. 
J. Scott, Christian Life, i. >. 
equilibriouslyt (e-kwi-lib'ri-us-li), adv. In an 
equilibrious or balanced manner; in equipoise. 
Some truths seem almost falsehoods, and some false- 
hoods almost truths ; wherein falsehood and truth seem 
almost equilibriously stated. 
Sir T. Browne, Christ. Mor., iii. 8. 
equilibrism (e-kwi-H'brizm), n. [< L. (equili- 
bris, evenly balanced, + -ism.'] A special form 
of the doctrine of free will which supposes a 
power of counteracting every volition by an 
opposite inhibitory volition. 
equilibrist (e-kwi-li'brist), n. [= F. equili- 
brists = Sp. Pg. equilibrista ; as L. (equiljbris, 
and opposite. When a body, being slightly moved out of 
its position, always tends to return to its position, the lat- 
ter is said to be one of stable equilibrium; when a body, 
Earnis.] I. a^Of, pertaining'to, or resembling 
a horse, or its structure, etc. ; belonging to the 
ter is said to be one of table equilibrium; when a body, h ki d 5 narrow sense, like a horse, as 
on the contrary, once removed, fio_wever slight y, from the > . 
, 
position of equilibrium, tends to depart from it more and 
more, like a needle balanced on its point, its position is 
said to be one of unstable equilibrium; and when a body, 
being moved more or less from its position of equilibrium, 
will rest in any of the positions in which it is placed, and 
is indifferent to any particular position, its equilibrium is 
distinguished from an ass: as, equine and asi- 
nine genera, traits, etc. 
The shoulders, body, thighs, and mane are equine; the 
head completely bovine. .Barrow. 
II. n. Ahorse; an animal of the horse family. 
. 
said to be neutral or indifferent. A perfect sphere, of uni- equinecessaryt (e-kwi-nes'e-sa-ri), a. [< L. 
form material, resting upon a horizontal plane, is in a ,.,,.,., i _i_ J/><K>//WJ/ -npppsRnrv 1 "Rminl- 
' librlum an oblate sheroid with its <Z*, equal, + ncccssanus, ne 
state of neutral equilibrium ; an oblate spheroid with its 
axis of rotation vertical is in stable equilibrium ; while a 
prolate spheroid with- its axis vertical is in unstable equi- 
librium on the same plane. A body suspended by its center 
of gravity is in a state of neutral or indifferent equilibrium. 
perpendicularly below the point of suspension ; but if the 
center of gravity is above the point of suspension, the 
equilibrium will be unstable. 
If any forces, acting on a solid or fluid body, produce 
equilibrium, we may suppose any portions of the body to 
become fixed . . . without destroying the equilibrium. 
Thomson and Tail, Nat. Phil., 664. 
When at rest under the action of two equal and oppo- 
site forces, a point is said to be in equilibrium. 
Jt. S. Hall, Exper. Mechanics, p. C. 
2. The state of balance of any causes, powers, 
or motives, so that no effect is produced. 
The balance is turned, and wherever this happens there 
is an end of the doubt or (Eqitilibrium. 
Sharp, A Doubting Conscience. 
Enabled them eventually to restore the equilibrium 
which had been disturbed by the undue preponderance of 
the aristocracy. frescott, Ferd. and Isa,, i. 6. 
3. A state of just poise ; a position of due bal- 
ance. Especially (a) Mental balance. 
Only Shakespeare was endowed with that healthy eqtii- 
libriunioi nature whose point of rest was midway between Same as (juinnat 
the imagination and the understanding. OQUinOCtia (e-kwi-nok'shia), n. pi. 
ly necessary. [Bare.] 
For both to give blows and to carry [bear], 
In fights are equi ne.cessary. 
S. Butler, Hudibras, I. iii. 1034. 
equinia (e-kwin'i-ii), n. [NL., < L. equinus, of 
a horse: see equine.] A dangerous infectious 
disease, communicated usually by contagion, 
occurring principally in horses, asses, and 
mules, but also occasionally in other domestic 
animals except cattle, and in man. The salient 
features of the disease are the formation of smiill tuber- 
cles, breaking down into ulcers, and the diffuse infiltra- 
tion of large and irregular patches with a serous fluid con- 
taining numerous round cells. In addition, abscesses of 
considerable size are formed, and the lymphatics become 
inflamed and swollen. These processes go on for the 
most part in the cutaneous and subcutaneous tissues, and 
in the mucous and submucous tissues of the lungs and air- 
passages, especially the nose. If the cutaneous symptoms 
are in abeyance while the mucous membrane of the nose 
is severely affected and the discharge profuse, the disease 
is called (/landers ; if the cutaneous symptoms are well 
developed while the discharge from the nose is insensible, 
it is called farcy. Each of these forms may be either acute 
or chronic. Equinia in man is in a majority of cases fatal. 
It seems to be caused by a bacillus of about the size of the 
tubercle-bacillus. 
(e-kwin'ji), n. [Amer. Ind. (Oregon).] 
Lowell, Study Windows, p. 316. 
(6) In the fine arts: (1) The just poise or balance of a fig- 
ure or other object, making it appear to stand firmly. (2) 
The properly balanced disposition or arrangement of or> 
jects, lights, shadows, etc. 
4. Equality of influence or effect; due or just 
relationship. 
Health consists in the equilibrium between these two 
powers. Arbuthnot. 
Center of equilibrium. See eenterl. Relative equi- 
librium, the instantaneous equilibrium of a particle ; a 
situation from which a particle does not tend to move 
BO long as other particles are held in their actual posi- 
tions. Thus, a drop of water on the crest of a wave is in 
relative equilibrium. Thermal equilibrium, such a 
distribution of heat within a gas subject to external 
forces (say the atmosphere) that no slow currents of its 
parts will alter the distribution of the heat in space. 
Thus, if the increase of pressure due to bringing a portion 
of air from any height to the earth would increase its 
temperature just enough to bring that air to the tempera- 
ture of the surrounding air, the atmosphere would be in 
thermal equilibrium. 
equilibrium-scale (e-kwi-lib'ri-um-skal), n. A 
scale or balance for weighing so arranged that 
if disturbed by any increase or diminution of the 
weight on the platform it will immediately re- 
turn to a state of equilibrium or constant bal- 
ance. It is used in recording the increase or loss of 
weight in living plants or animals, under varying circum- 
stances of work or feeding, evaporation, etc. 
^ [< L. cequi- 
noctia, pi. of aquinoctium": 'see^equinox.] Tho 
equinoxes. [Rare.] 
Tempests in State . . . are commonly greatest when 
things grow to equality, as natural tempests about the 
equinoctia. Bacon, Seditions and Troubles (ed, 1887). 
equinoctial (e-kwi-nok'shal), a. and n. [For- 
merly also (Equinoctial; < ME. equinoctial, equi- 
noxial = OF. equinocial, F. equinoxial = Pr. Sp. 
Pg. equinoctial = It. equinoziale, < L. (equiitoc- 
tialis, { (cquinoctiu))!, equinox: see equinox.'] I. 
a. 1. Pertaining to the equinoxes; marking an 
equal length of day and night: as, the equinoc- 
tial line, or equator. 
The middel cercle in wydnesse of thise 3 is cleped the 
cercle equinoxial upon whiche turneth evermo the hedes 
of Aries and Libra. Chaucer, Astrolabe, i. 17. 
Thrice the equinoctial line 
He circled; four times cross'd the car of night 
From pole to pole, traversing each colure. 
Milton, P. L., ix. 64. 
2. Pertaining to the regions or climate of the 
equinoctial line, or equator; in or near that line: 
as, equinoctial heat; an equinoctial sun; equi- 
noctial wind. 3. Occurring at the time of an 
equinox: as, an equinoctial storm Equinoctial 
colure the (treat circle passing through the pules and equi- 
n.M-tial points. See euliire. Equinoctial dial. Seedial. 
Equinoctial flowers, flowers that open at a regular 
