Dynamostes 
of longicorn beetles, of the family Cerambyci- 
dce. There is but one species, D. audax, of the 
East Indies. 
dynast (dl'nast), n. [= F. dynaste = Pg. dy- 
nanta = Sp. It. dinasta, < L. dynastes (ML. also 
*dynasta), < Or. Swdarw, a lord, master, ruler, 
< iiivaaOai, be able, strong : see dynam.} A rul- 
ing prince ; a permanent or hereditary ruler. 
Philosophers, dynasts, monarchs, all were involved and 
overshadowed in this mist. Burton, Anat. of Mel., p. 599. 
The ancient family of Des Ewes, dynasts or lords of the 
dition of Kessell. A. Wood, Athenra Ojton. 
This Thracian dynast is mentioned as an ally of the Athe- 
nians against Philip in an inscription found some years ago 
in the Acropolis at Athens. 
B. V. Head, Historia Kumorum, p. 241. 
dynastat (dl-nas'tii), n. [< ML. "dynasta, L. 
dynastes, < Gr. Swdortif : see dynast.} Same as 
dynast. 
Wherefore did his mother, the virgin Mary, give such 
praise to God in her prophetic song, that he had now by 
the coming of Christ cut down dynastag, or proud mon- 
archs? Hilton, Tenure of Kings and Magistrates. 
Dynastes (di-nas'tez), n. [NL., < Gr. 
a ruler: see dynast.'] A genus of lamellicorn 
beetles, of the family Scarabceidai or typical of 
a family Dynastidee. It is restricted to forms having 
the external maxillar lobe with 3 or 4 small median teeth, 
no lateral prothoracic projections, and the last tarsal joint 
arcuate and clubbed. The type is D. hercules, the Her- 
cules-beetle, the largest known true insect, having a length 
of about 6 inches, of which the curved prothoracic horn is 
nearly one half. 
dynastic (di-nas'tik), a. [= F. dynastique = 
Sp. dindstico; cf. D. G. dynastisch = Dan. Sw. 
dynastisk, < Gr. 6vvaariK6^, < SwaaTJis, a ruler: 
see dynast.'] Relating or pertaining to a dy- 
nasty or line of kings. 
In Holland dynastic interests were betraying the wel- 
fare of the republic. Bancroft, Hist. Const., H. 365. 
The civil wars of the Roses had been a barren period in 
English literature, because they had been merely dynastic 
squabbles, in which no great principles were involved 
which could shake all minds with controversy and heat 
them to intense conviction. 
Lowell, Among my Books, 2d ser., p. 150. 
The dynastic traditions of Europe are rooted and ground- 
ed in the distant past. 
Stubbs, Medieval and Modern Hist., p. 15. 
dynasticism (di-nas'ti-sizm), n. [< dynastic + 
-ism.] Kingly or imperial power handed down 
from father to son ; government by successive 
members of the same line or family. 
In the Old World dynasticismis plainly in a state of de- 
cadence. Qoldwin Smith, Pop. Sci. Mo., XX. 628. 
Dynastidae (d!-nas'ti-de), n. pi. [NL., < Dy- 
nastes + -idee.} A family of lamellicorn beetles, 
taking name from the genus Dynastes, and con- 
taining a few forms remarkable for their great 
size and strength. They are chiefly tropical, and 
burrow in the ground. The Hercules-beetle, elephant- 
beetle, and atlas-beetle are examples. The group is usually 
merged in Scarabaeidae. 
dynastidan (dl-nas'ti-dan), . [< Dynaslidoe 
T -an.'] One of the Dyilastidce. 
dynasty (di'nas-ti), n. ; pi. dynasties (-tiz). [= 
D. G. dynastie = Dan. Sw. dynasti, < F. dynastie 
= Sp. dinastia = Pg. dynastia = It. dinastia, < 
ML. dynastia, dinastia, < Gr. Swaareia, lordship, 
rule, < SvvdaTqs, a lord, master, ruler: see dy- 
nast.'] If. A government ; a sovereignty. 2. 
A race or succession of sovereigns of the same 
line or family governing a particular country : 
as, the successive dynasties of Egypt or of 
France. 
At some time or other, to be sure, all the beginners of 
dynasties were chosen by those who called them to govern. 
Burke, Rev. in France. 
It is to Manetho that we are indebted for that classifi- 
cation called by the Greeks Dynasties, a word applied gen- 
erally to those sets of kings which belonged to one family, 
or who were derived from one original stock. These Dy- 
nasties were named as well as numbered, and their names 
were derived from the town, or region, whence the found- 
er came or where he lived. 
H. S. Osborn, Ancient Egypt, p. 49. 
dyne (din), n. [Abbr. of dynam, < Gr. ivva/us, 
power: seedynam.} In physics, the unit of force 
in the centimeter-gram-second system, being 
that force which, acting on a gram for one sec- 
ond, generates a velocity of a centimeter per 
second; the product of a gram into a centi- 
meter, divided by the square of a mean solar 
second. The force of a dyne is about equivalent to the 
weight of a milligram. It requires a force of about 445,000 
dynes to support one pound of matter on the earth's sur- 
face in latitude 45. 
The dyne is about 1.02 times the weight of amilligramme 
at any part of the earth's surface ; and the megadyne is 
about 1.02 times the weight of a kilogramme. 
J. D. Everett, Units and Phys. Const., p. 167. 
dyocsetriacontahedMn, dyokaitriakontahe- 
dron (di'9-se-, di"o-ki-tri-a-kon-ta-he'dron), n. 
1810 
[< Gr. Svo KM Tpi&KovTa, thirty-two (Svo = E. two; 
Kal, and; rpidnovra = L. triginta = E. thirty), + 
eSpa, seat, base.] In geom., a solid having thirty- 
two faces. 
dyophysitic (di"o-fi-zit'ik), a. [< Gr. Svo, = E. 
two, + Qvaif, nature, + -ite z + -ic. Cf. diphy- 
site.} Having two natures. 
They agree in the attempt to substitute a Christ-person- 
ality with one consciousness and one will for a dyophysitic 
Christ with a double consciousness and a double will. 
Schaff, Christ and Christianity, p. 94. 
dyotheism (di'o-the-izm), n. [< Gr. Svo, = E. 
two, + Oc6(, a god, + -ism. Cf. ditheism, the 
preferable form.] The doctrine that there are 
two Gods, or a system which recognizes such a 
doctrine; dualism. 
It [Arianism] starts with a zeal for the unity and the 
nnchangeableness of God; and yet ends in dyotheism, the 
doctrine of an uncreated God "and a created God. 
Schaf, Christ and Christianity, p. 58. 
dyothelism (di-oth'e-lizm), n. [Alsodiothelism; 
< Gr. Svo, = E. two, + 6efatv, will, + -ism.} The 
doctrine that Christ had two wills, 
dyothelite (dl-oth'e-llt), n. and a. [As dyothe- 
lism + -ifc 2 .] I. n. A believer in dyothelism. 
II. a. Pertaining to dyothelism. 
The reply of the Western Church was promptly given in 
the unambiguously dyothelite decrees of the Lateran synod 
held by Martin I. in 649. Encyc. Brit., XVI. 758. 
dys-. [< L. dys-, < Gr. Sva-, an inseparable pre- 
fix, opposed to EI>- (see eu-), much like E. mis- 2 
or tin-f, always with notion of ' hard, bad, un- 
lucky,' etc., destroying the good sense of a 
word or increasing its bad sense ; = Skt. dus- 
= Zen&dush- = Ir. do- = Goth, tus-, tuz- = OHG. 
zur- = Icel. tor-, hard, difficult.] An insepa- 
rable prefix in words of Greek origin, signify- 
ing ' hard, difficult, bad, ill,' and implying some 
difficulty, imperfection, inability, or privation 
in the act, process, or thing denoted by the word 
of which it forms a part. 
dysaesthesia (dis-es-the'si-a), n. [NL., < Gr. 
SvaataOr/aia, insensibility, < 'Svaaiafhrrof, insensi- 
ble, < Sva-, hard, + alaSirrof, verbal adj. of diaSa- 
veaOat, perceive, feel.] In pathol., impaired, 
diminished, or difficult sensation; dullness of 
feeling; numbness; insensibility in some de- 
gree. Also spelled dysesthesia. 
dysaesthetic (dis-es-thet'ik), a. [< dyscesthesia, 
after esthetic.} Affected by, exhibiting, or re- 
lating to dysKsthesia. Also spelled dysesthetie. 
dysanalyte (dis-an'a-lit), n. [< Gr. Svaavdivrof, 
hard to undo, < Sva-', hard, + avakvTof , dissolu- 
ble: see analytic.} A mineral related to pyro- 
chlore, occurring in small black cubic crystals 
in limestone at Vogtsburg in the Kaiserstuhl, 
a mountainous district of Baden. 
dysarthria (dis-ar'thri-a), n. [NL., < Gr. Sva-, 
hard, + apBpov, a joint.'] In pathol., inability 
to articulate distinctly ; dyslalia. 
dysarthric (dis-ar'thrik), a. [< dysarthria + 
-ic.} Of or pertaining to dysarthria. 
Dysaster (dis-as'ter), n. [NL., < Gr. Sva-, bad, 
+ aaTr/p = E. star.} A genus of fossil petalosti- 
chous sea-urchins, of the family Cassidulidce or 
Collyritides, or giving name to a family Dysas- 
teridee. 
Dysasteridae (dis-as-ter'i-de), n. pi. [NL., < 
Dysaster + -idcv.} A family of irregular or exo- 
cyclic sea-urchins, typified by the genus Dysas- 
ter, with ovoid or cordate shell, showing bivi- 
um and triyium converging to separate apices, 
non-petaloid ambulacra, and eccentric mouth. 
dyschezia (dis-ke'zi-a), n. [NL., < Gr. Sva-, 
hard, + x%tiv, defecate.] In pathol., difficulty 
and pain in defecation. 
dyschroia, dyschroa (dis-kroi'a, dis'kro-a), n. 
[NL., < Gr. Sva-, bad, + ;tyx<i, Attic also xp a , 
color.] In pathol., discoloration of the skin 
from disease. 
dyschromatopsia (dis-kro-ma-top'si-ii), n. 
[NL., < Gr. duo--, bad, + ^p6>^o(f-), color, 4- 6ipif, 
view, sight.] In pathol., feeble or perverted 
color-sense. Also dyschromatopsy, dtschroma- 
topsis. 
dysclasite (dis'kla-sit), n. [< Gr. Sva-, hard, + 
/c/ldo-(f, a breaking (< Kkdv, break), + -ite 2 .] In 
mineral., a mineral, usually fibrous, of a white 
or yellowish color and somewhat pearly luster, 
consisting chiefly of hydrous silicate of lime. 
Also called okenite. 
dyscophid (dis'ko-fid), n. A toad-like amphib- 
ian of the family Dyscophidce. 
Dyscophidas (dis-kdf'i-de), n. pi. [NL., < Dys- 
cophus + -idee.} A family of firmisternial sa- 
lient anurous amphibians, typified by the ge- 
nus Dyscophus, with teeth in the upper jaw, di- 
lated sacral diapophyses, precoracoids resting 
Dysidea 
upon coracoids, a cartilaginous omosternum, 
and a very large anchor-shaped cartilaginous 
sternum. There are several genera, chiefly Madagascar!. 
Some of these frogs are remarkable for the beauty of their 
coloration. 
Dyscophus (dis-ko'fus), . [NL., < Gr. Sva- 
xu^of, stone-deaf, < Sva-, hard, + Ku<t>6f, deaf.] 
1. A genus of tailless amphibians, typical of 
the family Dyscophidw. 2. In entom.: (a) A 
genus of the orthopterous family (Ecanthidcn, 
having the front deflexed and the male elytra 
rudimentary, typified by D. saltator of Brazil. 
Saussure, 1874. (6) A genus of South American 
Lepidoptera. Bnrmeister, 1879. 
dyscrase (dis'kras), n. [Formerly also dis- 
crase; < NL. dyscrasia : see dyscrasia.} Same 
as dyscrasia. 
dyscrasia (dis-kra'si-a), n. [NL., < Gr. Svanpa- 
aia, bad temperament, < Svanparos, of bad tem- 
perament, < Sva-, bad, + *Kpar6f, verbal adj. of 
Kspavvvvai, mix (> icpdaic,, mixture): see crater, 
crasis.} In pathol., a generally faulty condi- 
tion of the body; morbid diathesis; distemper. 
Also dyscrase, dyscrasy, and formerly discrase, 
discrasy. 
dyscrasic (dis-kras'ik), a. [< dyscrasia + -ic.} 
Of, pertaining to, or of the nature of dyscrasia; 
characterized by dyscrasia: as, dyscrasic de- 
generation. 
It should not be forgotten that the death-rate was greater 
among dyscrasic children. N. Y. Mcd. Jour., XL. 645. 
dyscrasite (dis'kra-sit), n. [< Gr. duo--, bad, -f 
Kpdaif, a mixture (see dyscrasia), + -Jte 2 .] A 
mineral of a silver-white color and metallic 
luster, occurring in crystals, and also massive 
and granular. It consists of antimony and silver. Also 
written discrase, discrasite, and also called antimonial sil- 
ver (which see, under silver). 
dyscrasy (dis'kra-si), n. ; pi. dyscrasies (-siz). 
[Formerly also d'iscrasie; < F. dyscrasie. < NL. 
dyscrasia : see dyscrasia.} Same as dyscrasia. 
Sin is a cause of dyscrasies and distempers, making our 
bodies healthless. Jer. Taylor, Works (ed. 1835), I. 256. 
A general malaise or dyscrasy, of an undefined charac- 
ter, but indicated by a loss of appetite and of strength, 
by diarrhoea, nervous prostration, or by a general impair- 
ment of health. Pop. Sci. Uo., XXII. 6. 
Dysdera (dis'de-rii), n. [NL. (Latreille, 1804), 
< Gr. SvaSr/pu;, hard to fight with, < Sva-, hard, + 
Srjpif, fight.] The typical genus of spiders of 
the family Dysderid<e. 
Dysderidae (dis-der'i-de), n. pi. [NL., < Dys- 
dera + -ida;.} A family of tubitelarian spiders, 
typified by the genus Dysdera. They are especially 
distinguished by having two pairs of stigmata, one just 
behind the other, and distributed on each side of the belly 
near its base; they have but six eyes or fewer. Also 
called Dysderides and DysderoidtB. 
dysenteric, dysenterical (dis-en-ter'ik, -i-kal), 
a. [= F. dysenterique, dyssenterique = Sp. di- 
senterico = Pg. dysenterico = It. disenterico, 
dissenterico, < L. dysentericus, < Gr. Svaevrcpwos, 
< Svatvrcpia, dysentery : see dysentery.} 1. Per- 
taining to, of the nature of, accompanied by, 
or resulting from dysentery: as, dysenteric 
symptoms or effects. 2. Suffering from dys- 
entery: as, a dysenteric patient. 
dysenterious (dis-en-te'ri-us), a. [< dysentery 
+ -ous.} Same as dysenteric. [Rare.] 
All will be but as delicate meats dressed for a dysente- 
rious person, that can relish nothing. Oataker. 
dysentery (dis'en-ter-i), n. [Formerly dysen- 
teric; < F. dysenteric, dyssenterie = Sp. disen- 
teria = Pg. dysenteria = It. disenteria, dissen- 
teria = D. dyssenterie = G. dysenteric = Dan. 
Sw. dysenteri, < L. dysenteria, < Gr. Svcmrcpia, 
dysentery, < Svaivrepos, suffering in the bowels, 
< Sva-, bad, ill, + evreppv, pi. ivrepa, the bow- 
els: see entero-.} A disease characterized by 
inflammation of the mucous membrane of the 
large intestine, mucous, bloody, and difficult 
evacuations, and more or less fever. 
dysepulotic (dis-ep-u-lot'ik), a. [< Gr. Sva-, 
hard, + epulotic, q. v.] In surg., not healing 
or cicatrizing readily or easily: as, a dysepu- 
lotic wound. 
dysesthesia, dysesthetie. See dysaxthcsia, 
dyscesthetic. 
dysgenesic (dis-je-nes'ik), a. [< dysgcnesis + 
-ic.] Breeding with difficulty ; sterile ; infe- 
cund; barren. Daririn. 
dysgenesis (dis-jen'e-sis), n. [NL., < Gr. Sva-, 
hard, + yiveaiq, generation.] Difficulty in 
breeding; difficult generation; sterility; in- 
fecundity. 
Dysidea (di-sid'e-a), n. [NL., < Gr. Sva-, hard, 
bad, + iSia, form: see idea.} A genus of 
sponges, typical of the family Dysideidw. Also 
Duscideia. 
