extension-pedal 
and thus prolonging the tone; the damper- 
pedal, or loud pedal. 
extension-table (eks-ten'shou-ta/bl), n. A 
table the frame of which is capable of being 
drawn out in length for the insertion of addi- 
tional leaves on the top. Such tables are especially 
used for dining-tables. There are several different me- 
chanical contrivances used in their manufacture. 
extensity (eks-ten'si-ti), n. [< L. extensus, pp. 
of extendere, extend"(see extense), + -ity; after 
intensity.] That kind or element of sensation 
from which the perception of extension is de- 
veloped. It is, according to some psychologists, an ele- 
ment in most of our sensations, and is more or less in 
amount, according to the greater or smaller number of 
nerve-terminals excited. Other psychologists deny or 
doubt the existence of any such special feeling. 
In a given sensation, more particularly in our organic 
sensations, we can distinguish three variations : viz., va- 
riations of quality, of intensity, and of what Dr. Baiu has 
called massiveness, or, as we will say, extensity. 
J. Ward, Encyc. Brit., XX. 46. 
Extensity is Mr. Ward's name ... for this primitive 
quality of sensation, out of which our several perceptions 
of extension grow. W. James, Mind, XII. 183, note. 
2092 
One great cause of our insensibility to the goodness of 
the Creator is the very extenifenens of his bounty. 
Paley, Nat. Theol., xxvi. 
extenuate 
extensi- 
riii,-t/, Nat. T! 
2f. The capacity of being extended; 
bility. 
Here, by the by, we take notice of the wonderful dilata- 
liility or extensiveness of the throats and gullets of .-,, i 
["Tits. Kay, Works of Creation, i. 
3. Same as extensity. [Rare.] 
Extensiveness, being an entirely peculiar kind of feeling, 
indescribable except in terms of itself, and inseparable in 
actual experience from some sensational quality which it 
must accompany, can itself receive no other name than 
that of sensational element. W. James, Mind, XII. 2. 
extensometer (eks-ten-som'e-ter), . [Irreg. 
< L. extensuy, pp. of extendere, extend, + me- 
trum, a measure.] An apparatus for measuring 
minute degrees of expansion or contraction in 
metal bars under the influence of temperature 
or under strain. See expansion. 
extensor (eks-ten'sor), n. ; pi. extensors, exten- 
sores (eks-ten'sorz, eks-ten-so'rez). [= F. ex- 
tenseur = Pg. extensor = It. estensore, < LL. 
extensor, lit. a stretcher (used of one who 
stretches on the rack, a torturer), < L. extendere, 
extensive (eks-ten'siv), a. [= F. extensif = 
Pr. extensiu = Sp. Pg. extensive = It. estensiro, pp . ex t en sus, stretch out : see extend.] In anat. , 
xte,ns*vo, < LL. extensivus, < L extensus. pp. of a muscle which gerves to extend or straighten 
extendere, extend : see extend.] If. That may 
be extended or spread out ; extensible. 
But these two 
Make the rest ductile, malleable, extensive. 
B. Jonson, Alchemist, ii. 3. 
Silver-beaters choose the finest coin, as that which is 
most extensive under the hammer. Boyle. 
2. Having considerable extent ; wide ; large ; 
embracing a wide area or a great number of 
objects ; diffusive : as, an extensive farm ; an 
extensive sphere of operations ; extensive benev- 
olence. 
Op'ning the map of God's extensive plan, 
We find a little isle, this life of man. 
Cowper, Retirement, 1. 147. 
3. Pertaining to or characterized by extension 
in space or in any quantity ; having extent or 
extension. 
We do not first experience a succession of touches or 
of retinal excitations by means of movements, and then, 
when these impressions are simultaneously presented, re- 
gard them as extensive because they are associated with 
or symbolize the original series of movements ; but, be- 
fore and apart from movement altogether, we experience 
that massiveness or extensity of impressions in which 
movements enable us to find positions, and also to mea- 
sure. J. Ward, Encyc. Brit., XX. 58. 
All our sensations are positively and inexplicably exten- 
sive wholes. W. James, Mind, XII. 538. 
4. Pertaining to logical extension Extensive 
completeness of a cognition, the perfection of extensive 
distinctness; thoroughness. Extensive distinctness, 
the division of the logical extension of a term, in the ap- 
prehension of it, into many coordinated marks. Thus a 
man who knows all the genera of a zoological or botanical 
family may increase the extensive distinctness of his know- 
ledge by learning all the species. Extensive energy 
See energy. Extensive proposition, in the logic of Sir 
William Hamilton and his followers, a proposition whose 
predicate is regarded as a whole under which the sub- 
ject is contained. Extensive quantity, (a) Continuous 
quantity of space and time. 
I call an extensive quantity that in which the represen- 
tation of the whole is rendered possible by the represen- 
tation of its parts, and therefore necessarily preceded by 
it. I cannot represent to myself a line, however small it 
may be, without drawing it in thought. 
Kant, Critique of Pure Reason, tr. by Muller. 
(b) Logical extension. 
The external or extensive quantity of a concept is de- 
termined by the greater or smaller number of classified 
concepts or realities contained under it. Sir W. Hamilton. 
Extensive sublimity, the possession of so great a mul- 
titude of parts that the imagination sinks under the at- 
tempt to represent the whole by an image, thus giving 
rise to a peculiar emotion. = SyrL 2. Broad, comprehen- 
sive, capacious, extended, spacious, roomy, ample 
extensively (eks-ten'siv-li), adv. 1. With re- 
gard to extension or extent. 
By more complex efforts that are found to procure tac- 
tile impressions (continuous or discrete, as the case may 
be) efforts not interpretable as movements till they 
have done their part in the work of psychological construc- 
tion we distinguish this and that extensively within such 
body, and the body as a whole in relation to our own bodily 
frame. Q. c. Robertson, Mind, XIII. 423. 
2. In an extensive manner; widely; largely; 
to a great extent : as, a story extensively circu- 
lated. 
'Tis impossible for any to pass a right judgement con- 
cerning them, without entering into most of these cir- 
cumstances, and surveying them extensively. 
Watts, Improvement of Mind. 
Like hoys who are throwing the sun's rays into the eyes 
of a mob by means of a mirror, yon must shift your lights 
and vibrate your reflexions at every possible angle, if you 
would agitate the popular mind extensively. 
De Quincey, Style, i. 
extensiveness (eks-ten'siv-nes), n. 1. The 
quality of being extensive. 
any part of the body, as an arm or a finger : 
opposed to flexor. See cut under muscle. 
Extensor brevis dlgltorum, the short extensor of the 
toes ; a muscle of the dorsum of the foot, extending the 
toes. Also called brevextensor diyitorum. Extensor car- 
pi radlalis brevlor, the shorter radial wrist-extensor ; 
the shorter one of two muscles on the radial aspect of the 
forearm, extending the hand. Extensor carpi radia- 
lls longior, the longer radial wrist-extensor; the longer 
one of two muscles upon the radial aspect of the forearm, 
extending the hand. Extensor carpi ulnaris, the ulnar 
wrist-extensor ; a muscle upon the ulnar aspect of the fore- 
arm, extending the hand. Extensor coccygis, the e\ 
tensor of the coccyx ; a muscle, rudimentary in man, upon 
the back of the coccyx, the termination of the general ex- 
tensor system of the back : in many animals an important 
muscle, lifting the tail. Extensor comrnunis digito- 
rum, the common extensor muscle of the flngers.Tying 
upon the back of the forearm and hand. See cut under 
muscle. Extensor indicts, theextensorof the forefinger; 
a deep-seated muscle of the back of the forearm and hand. 
Extensor longus digitorum, the long extensor of the 
toes ; a muscle upon the front of the leg and dorsum of the 
foot, extending the toes collectively. Extensor minimi 
digit!, the special extensor of the little linger. Extensor 
oasis metacarpi poUicis, the extensor of the metacarpal 
bone of the thumb ; a deep-seated muscle of the forearm, 
extending the metacarpal bone of the thumb. Extensor 
patagii, in ornith. See patagium. Extensor primi In- 
ternodii pollicis, the extensor of the first joint of the 
thumb ; a deep-seated muscle of the forearm, extending the 
proximal phalanx of the thumb. Extensor proprius 
pollicis, the proper extensor of the great toe ; a long muscle 
of the front of the leg and dorsum of the foot, extending the 
great toe. Also called extensor lontnts pollicis and extensor 
halluci*. See cut under muscle. 'Extensor secundl in- 
ternodil pollicls, the extensor of the second joint of the 
thumb ; a deep-seated muscle of the forearm, extending 
the terminal joint of the thumb. See quadriceps, triceps. 
extensum (eks-ten'sum), n. [< L. extensum, 
neut. of extensus, pp. of extendere, extend : see 
extend, extense.] An extended body. 
To suppose every soul to be but one physical minimum, 
or smallest extensum, is to imply such an essential differ- 
ence in matter or extension as that some of the points 
thereof should he naturally devoid of all life, sense, and 
understanding, and others again sensitive and rational. 
Cudworth, Intellectual System, v. 3. 
extensuret (eks-ten'sur), n. [< L. extensits, pp. 
of extendere, extend (see extense), + -ure. Ct. 
extendure.] Extent; extension. 
I spy'd a goodly tree, 
Under the extensure of whose lordly arms 
The small birds warbled their harmonious charms. 
Drayton, The Owl. 
extent (eks-tenf), n. [< ME. extente, valuation, 
< OF. extente, exstente, estente, estende, estande, 
extent, extension; in law (AF. extente, AL. ex- 
tenta), survey, valuation; < L. extendere, pp. 
extentvs, extend, ML. (AL.), refl. se extendere, 
extend itself, i. e., amount, be worth: see ex- 
tend."} 1. The space or degree to which a thing 
is or may be extended ; length ; compass ; bulk ; 
size ; limit : as, the extent of a line ; a great ex- 
tent of country or of body ; the utmost extent of 
one's ability. 
The practice of burning was also of great antiquity, 
and of no slender extent. Sir T. Browne, Urn-burial, i. 
The real measure of extent is not the area on the map, 
but the means of communication. 
E. A. Freeman, Amer. Lects., p. 353. 
The excuses of the appellants were to some extent a con- 
fession of guilt. Stubbs, Const. Hist, $ 303. 
2f. Communication; distribution; bestowal. 
Was ever seen 
An emperor in Rome thus overborne, 
Troubled, confronted thus ; and, for the extent 
Of egal justice, used in such contempt ? 
Shak., Tit. And., iv. 4. 
3. In law: (a) Valuation; specifically, a census 
or general valuation put upon lands, for the pur- 
pose of regulating the proportion of public sub- 
sidies or taxes exigible from them, as well as 
for ascertaining the amount of the casualties 
due to the superior. 
Item, that all schirefis he sworne to the king or his dt-p- 
utis, that thai sail k-k-lv and treuly ger [cause] this extent 
be fulflllit of all the lamlis and gndis. 
Acts James J., 1424 (ed. 1814), p. 4. 
Let my officers of such a natmv 
Make an extent upon his house and lands. 
Shak., As you Like it, iii. 1. 
(6) A peculiar remedy to recover debts of 
record due to the crown, differing from an 
ordinary writ of execution at the suit of a 
subject, in that under it the body, lauds, and 
goods of a debtor may be all taken at once, 
in order to compel the payment of the debt. 
It is not usual, however, to seize the body. (Wharton.) 
Extents, or writs of extent, or writ* tif extend! facias, are 
so called because directing the property to be appraised 
at its full value (extent). They are issued at suit of the 
crown (extents in chief), or at suit of a private creditor 
who is himself indebted to the crown (extents in aid). 
Extents have been used in some of the United States, by 
which a judgment creditor could have the lands of the 
debtor valued, and transferred to himself, absolutely or 
for a term of years, instead of having them sold in satis- 
faction of the debt. 
A bond for 800 made by Lord Strange to plaintiff, and 
an extent upon the lands of Ferdinand. 
Record Soc. Lancashire and Cheshire, XI. 9. 
4. Logical extension or breadth. 5+. A vio- 
lent attack. Wright. 
Let thy fair wisdom, not thy passion, sway 
In this uncivil and unjust extent 
Against thy peace. Shak., T. N., iv. 1. 
Alar extent. Seeotor.=8yn. 1. Expanse, Extent; mag 
nitude, volume, stretch, compass. In zoology expanse^ and 
extent are the same, as applied to the stretch of the wings, 
or alar extent ; but usually expanse is said of insects' wings, 
t'jft>'ni of birds'. 
extentt (eks-tenf), a. [< L. cxtentus, pp. of ex- 
ten dere, extend: see extend.] Extended. 
Both his handes . . . 
Above the water were on high extent. 
>>/<>/, F. Q., II. vii. 61. 
Our king with ruyal apparayle, 
With swerd drawen bright and extent 
For to chastise enimies violent. 
llakliti/t's Voyayet, I. 202. 
extent (eks-tenf ),<!. [< extent, n., 3.] I. trans. 
To assess; lay on or apportion, as an assess- 
ment. [Now only Scotch.] 
Plaintiffs estate in Lowton and Newton extented upon 
judgments at the suit of defendant. 
Record Site. Lancashire anil Cheshire, XI. 41. 
H. in trans. To be assessed ; be rated for as- 
sessment. [Scotch.] 
extenuate (eks-ten'u-at), . ; pret. and pp. ex- 
tenuated, ppr. extenuating. [< L. extenuatus, 
pp. of extenuare (> It. estenuare, stenuare = Sp. 
Pg. Pr. cxtenuar = F. extenuer), make thin, re- 
duce, diminish, lessen, weaken, < ex + tenuare, 
make thin, < tennis, thin, = E. thin : see tenuix 
and thin.] I. trans. 1. To make thin, lean, 
slender, or rare ; reduce in thickness or density ; 
draw out ; attenuate. [Now rare in this literal 
sense.] 
He the congealed vapours melts again 
Extenuated into drops of rain. 
Sandys, Paraphrase of Job, p. 53. 
His body behind his head becomes broad, from which it 
is again extenuated all the way to the tail. 
A*. Grew, Museum. 
Nor were they less astonished at the appearance of the 
pale, extenuated [in some editions attenuated], half dead, 
yet still lovely female, whom the queen upheld by main 
strength with one hand. Scott, Kenilworth, xxxiv. 
2. To make smaller in degree or appearance ; 
make less blamable in fact or in estimation; 
lower in importance or degree, as a fault or 
crime ; mitigate ; palliate : opposed to aggra- 
rti te. 
Speak of me as I am ; nothing extenuate, 
Nor set down aught in malice. 
Shak., Othello, v. 2. 
Whatever little office he can do for you, he is so far from 
magnifying it that he will labour to extenuate it in all his 
actions and expressions. Steele, Spectator, No. 348. 
I have no desire to extenuate guilt, or to break down the 
distinction between virtue and vice. 
Channiny, Perfect Life, p. 75. 
3. To detract from, as a person or thing; less- 
en in honor, estimation, or importance. [Now 
rare.] 
Righteous are thy decrees on all thy works ; 
Who can extenuate thee? Milton, P. L., x. 644. 
Christianity has never altogether denied, but only ex- 
tenuated the claims of Art and Science. 
J. R. Seeley, Nat. Religion, p. 121. 
= Syn. 2. See palliate. 
II. intrans. To become thin or thinner or 
more slender; be drawn out or attenuated. 
[Rare.] 
