ignorance 
Preach, my dear sir, a crusade against ignnranrf; estab- 
lish and improve the law for educating the common peo- 
P'e. Je/enun, Correspondence, II. V,. 
Acquired knowledge asserts itself, and will not let us 
see as we saw in the day of our ignorance. 
George Eliot, Middleman*, II. 400. 
Ignorance (more properly, ignoration) of the eleucn. 
See ignoration. 
ignorancyt, Same as ignorance. 
So sore haue our false prophets brought yc people out 
of their wittes, & haue wrapped them in darcknes, and 
haue rocked them in blyndnes and ignorauncit. 
Tyndale, Works, p. 157. 
ignorant (ig'no-rant), a. and n. [< ME. iijuo- 
rant, < OF. ignorant, F. ignorant = Pr. fammMM 
= Sp. Pg. It. ignorante, < L. ignorant t-)s, ppr. 
of ignorare, have no knowledge of, be ignorant : 
see ignore.'} I. a. 1. Destitute of knowledge in 
general, or concerning some particular matter; 
uninstructed or uninformed ; untaught; unen- 
lightened. 
I am ashamed to be itjnorant in what sea that island 
standeth whereof I write so long a treatise. 
Sir T. More, Utopia, Ded. to Peter Giles, p. 9. 
They be ignorant of poesie that call such long tales by 
the name of Epitaphes ; they might better call them Ele- 
gies. 1 nit, nli'i in, Arte of Eng. Poesie, p. 40. 
Fools, alike ignorant of man and God ! 
Browning, King and Book, I. 319. 
The Dutch governor was at this time (1781) absolutely ig- 
ma-ant of the existence of a war between England and Hol- 
land. Leckn, Eng. In 18th Cent, xiv. 
2. Keeping one in ignorance. [Rare.] 
I beseech you, 
If you know aught which does behove my knowledge 
Thereof to be inform'd, imprison it not 
In ignorant concealment. Shak., W. T., L 2. 
3f. Unconscious; unaware. 
Ignorant of guilt, I fear not shame. Dryden. 
4f. Done unconsciously orinnocently; unknown 
to one's self as being of the kind mentioned. 
Alas ! what ignorant sin hare I committed ? 
Shak., Othello, Iv. 2. 
5. Showing want of knowledge ; arising from 
or caused by ignorance : as, an ignorant pro- 
ceeding; ignorant remarks. 
Whose iijnnrant credulity will not 
Come up to the truth. Shak., W. T., ii. 1. 
= Syn. 1. Ignorant, Illiterate, Unlettered, Unlearned, un- 
educated. Ignorant is the most general of these words 
(as, he Is an iffnorant fellow), except where It is limited to 
some subj ector point (as, ignorant of the ways of the world). 
Illiterate means not having read or studied, or, specifically, 
not able to read. The illiterate are presumably ignorant 
outside of their own work, but not necessarily so ; the ig. 
norant are necessarily illiterate. In modern times it is as 
reprehensible to be illiterate as to be ignorant. Unlettered 
is used sometimes for illiterate and sometimes for un- 
learned, with corresponding measuresof blame. Unlearn- 
ed that is, not learned is, like ignorant, either general 
or special: as, to be unlearned in theology ; as learning Is 
the privilege of few, it is not especially blameworthy to be 
even generally unlearned. 
Man, proud man ! 
Dress'd in a little brief authority, 
Most ignorant of what he's most assur'd. 
Shak., M. for M., U. 2. 
The illiterate warriors of the Middle Ages revived To- 
tems in the form of armorial bearings. 
Quarterly Rev., CLXII. 203. 
That unlettered, small-knowing soul. 
Shale., L. L. L, t 1. 
When they saw the boldness of Peter and John, and per- 
ceived that they were unlearned and ignorant men, they 
marvelled. Acts iv. 13. 
This doctrine may have appeared to the unlearned light 
and whimsical. Addiimt. 
H.t n. A person who is untaught or unin- 
formed; one who is unlettered or unskilled; an 
ignoramus. 
You are a herd of hypocritical proud ignmranti. 
B. Jonson, Bartholomew Fair, v. 2. 
I that was ere while the ignorant, the loyterer, on the 
sudden by his permission am now granted to know some- 
thing. Milton, Apology for Smectymnuus. 
discrimination of an object from others ; the re- 
training from precisely specifying what a pro- 
posed obiect of imagination shall be._ femora- 
tion Of coordinates. () A method in analytical geoml 
try in which a single letter represents that quantity which 
being equated to zero gives the equation to any given line, 
circle, or other locus. (6) The dynamical theory of gen- 
Iguvine 
and species closely related to it, such as the naked-necked 
'B aa " of south America, /. cM.V.<( .w/im, uml tin- horned 
i^-^" U m ingo,L cornuta. 
Iranian (l-gwa JU-an), a. and )i. I. ,t. Re- 
sembhug or related to an iguana ; belonging or 
relating to tlic li/iiiniiilir. 
eralized coordinates. Ignoration of the elench (iann- 
ratio elenchi), in logic, a fallacy which consists in refuting 
not the position of the antagonist, but another more or 
less similar position. Thus, if one party maintains that 
it is dangerous to base the definition of a word upon its 
derivation, and the other party replies by showing that 
derivations frequently throw great light upon the mean- 
ings of words, this reply is an ignoration of the elench. Iffiianid* (i irwnii'i HP"! r 7 PUT </>,., 
^JKS^S^^SA ^ * *53 tfJftittZ 
Dan. ignorere = Sw. ignorera, < F. ignorer = 
Pr. Sp. Pg. ignorar = lt. ignorare, < L. ignorare, 
have no knowledge of, mistake, take no notice 
of, ignore, < ignurua, not knowing, < in- priv. 
""7, knowing (&T.yyapl$etv, make known), 
The Iguanian lizards are lower than the Acrodont. 
E. D. Cope, Origin of the Fittest, p. 1 w. 
II. n. An iguana, or some similar li/unl. 
Also iijuaiioiil. 
iguanid (i-gwan'id), H. A lizard of the family 
Iguaiiiilic. 
i-gwan'i-de), n. pi. [NL., < 
A family of lizards of the super 
family Agamoidea and order Lacertilia, typified 
by the genus Iguana. The family was formerly of 
larger extent than now, including acrodont forms now 
referred to Agamida. Its distinctive character is the 
pleurodont dentition. The species are characteristically 
American, and chiefly inhabit the warmer parts of Amer- 
Brute and irrational barbarians, who may be supposed 
rather to ignore the being of God than deny it 
Boyle, Works, II. 50. 
2. To pass over or by without notice ; treat as 
if not known ; shut the eyes to ; leave out of ac- 
count; disregard: as, to ignore facts. 
Ignoring Italy under our feet, 
And seeing things before, behind. 
Mrs. Browning, First News from Villafranca. 
The moral law, irrnoring all vicious conditions, defects, 
and incapacities, prescribes the conduct of an ideal hu- 
manity. H. Spencer, Social Statics, p. 70. 
3. In Jaw, to throw out as beiug unsupported 
by evidence. See ignoramus, 1. 
ignorement (ig-uor'ment), re. [< ignore + 
-mcnt.] The act of ignoring, or the state of 
being ignored. Imp. Diet. 
ignosciblet (ig-nos'i-bl), a. [< LL. ignoscibilis, 
pardonable, < L. ignoscere, pardon, forgive, ex- 
cuse, < in- priv. + "gnoseere, iwscere, know; cf. 
ignore.'] Pardonable. E. Phillips, 1706. 
ignotet (ig-nof), a. and n. [= Sp. Pg. It. igno- 
to, < L. igitotus, unknown, < iw-priv. +*gnotus, 
notus, known, pp. of *gnoscere, noscere, = E. 
blOW.] I. a. Unknown; obscure. 
Shall such very ignote and contemptible pretenders be 
allowed a place among the most renowned of poctick 
writers? E. Phillips, Theatrum 1'oeticum, Pref. (1675). 
II. n. An unknown person. 
Their judgement was, the girts of peace were slack, but 
not broken. This is couched In the admonitions of an 
i'tii'ite unto King James. 
Bp. Uacket, Abp. Williams, I. 169. 
iguana (i-gwa'na), re. [NL., E., etc., E. also 
guana, formerly guano, < Sp. iguana, from the 
native Haytiau name, given variously as igoa- 
na, hiuana, yttana.] 1. A large lizard of the 
Ignorantin (ig-no-ran'tin), n. [P., < NL. 
rantinus, < L. ignoran(t-)s, ignorant.] In pop- 
ular usage, one of a religious order properly en- 
titled Brethren of the Christian Schools (which 
see, under brother). 
ignorantism (ig'no-ran-tizm). n. [= F. igno- 
' 
and are adapted to an arboreal life ; others, like the so- 
called horned toads, have a flattened form and are of ter- 
restrial habits ; a few are aquatic. Some attain a length 
of 5 or 6 feet A prominent feature of many of these liz- 
ards is the development of dermal appendages in the form 
of spines and crest along the back and elsewhere. The 
flesh of some is an important article of food. Leading gen- 
era of this family, besides Iguana, are Polychrus, Cyclu- 
ra, Banliteiu, Phrynotoma, Sceloporun, Crotaphytu*, Hoi- 
brookia, etc. By some Anolis Is also referred to the fam- 
ily, while by others it is considered typical of a peculiar 
family Anolidte or Anolidida. The species found in the 
Viiitwl States are all comparatively small and Inoffensive 
lizards, such as the common fence-lizard, the so-called 
chameleon, the horned toads, etc. See cuts under Basili*. 
\ Cyclura, and iguana. 
inn (i-gwan'i-form), a. [< iguana + L. 
form.] Resembling an iguana; igua- 
inan. 
Iguanodon (i-gwan ' o -don), n. [NL., < ig/tntui 
+ Gr. oooi'f (bSovT-) = E. tooth.] 1. The typi- 
cal genus of the fossil family Iguanodontida; : 
so called from the resemblance of the teeth to 
those of Iguana. The species, of which several are 
described, were of gigantic size, some being SO feet long. 
They stood up on their hind limbs, which were long and 
strong in comparison with the fore limbs; the latter 
were used for prehension rather than for locomotion. 
The tail was long and heavy, serving to steady the ani- 
mal in the erect posture and for swimming. The best- 
Preserved specimen, an almost perfect skeleton, is that of 
. bernixtartentis, found in Belgium, which, as mounted, 
stands 14 feet high and covers a horizontal line 28 feet 
long. 
2. [I. <!.] A species or a specimen of the genus 
Iguanodon or family Iguanodontida: The name 
is also loosely used for many related reptiles, being thus 
almost synonymous with dinosaur or diiioMumm. 
iguanodont (i-gwan'o-dont), a. and n. [< iguait- 
odon(t-)."] I. a. Having teeth like those of the 
iguana : specifically applied to the Iguanodon- 
tida'. 
II. u. An animal of the family Iguanodontida;. 
Iguanodontidae (i-gwan-o-don'ti-de), re. pi. 
[NL., < Igitanodon(t-) + '-ida;.'] A family of 
gigantic extinct dinosaurs, typified by the ge- 
nus Iguanodon, belonging to the order Dino- 
sauria (or Ornithoscelida), possessing clavicles 
and an incomplete post-pubis. These enormous 
saurians present a bird-like type of structure, especially in 
the hind limbs. The pelvic bones are strikingly like those 
of birds, especially in the length and slendemess of the 
ischium and pubis, and the obturator process of the former 
bone. The hind limbs are enlarged in comparison with 
the fore limbs ; the anterior vertebras are slightly amphi- 
coelous, the posterior Bat; the preinaxilue are beak-like 
and toothless ; and the mandibular symphysis is notched 
to receive the beak, as in some birds. The teeth are 
large and broad, transversely ridged, implanted in sock- 
ets and not aukylosed to the jaw, and woru down by 
Same as obscurantism. 
ignorantist (ig'no-ran-tist), re. [= F. ignoran- 
tiste Sp. ignoraiitista ; < ignorant + -ist.~\ 
Same as obscurant. 
ignorantly (ig'no-rant-li), adr. In an ignorant 
manner; without knowledge, instruction, or 
information : opposed to designedly. 
Whom therefore ye ignorantly worship, him declare I 
unto you. Acts xvii. 23. 
ignoration (ig-uo-ra'shon), n. [= Sp. iynora- 
cion, < L. <7)io)-a>(K-),"ignorance, < ignorare, 
not to know: see ignore.} A want of precise 
Tuberculatcd Iguana (Ifuaxa Ixbtrcvlattfi, 
warmer parts of America, of the genus Iguana; 
also, some similar lizard of a related genus. 
The best-known species is the tuberculated iguana, 7. 
tuberculata, of the West Indies and South America. It 
attains a length of 5 feet or more, and presents a rather 
formidable appearance, but is inoffensive unless molested ; 
it feeds upon vegetables, and its flesh is much used for 
food. The tail is very long, compressed, and tapering ; a 
row of scales along the back Is developed into a serrate 
crest or dorsal ridge ; the head is covered with scaly plates ; 
and the throat has a large dewlap. The iguana is of arbo- 
real habits, spending much of the time in trees and bushes, 
basking in the sun. It is easily approached, and is often 
captured by means of a noose attached to a stick. Its col- 
oration is variegated with brownish, greenish, and yellow- 
ish tints. 
2. [cap.] The typical and leading genus of 
the family IgUOniOte. It was formerly of great ex- 
tent, but is now restricted to /. tuberntlata (see above), 
Remains of Iguanodon. 
I. Right side of lower jaw. 2. a. two upper molars, external view; 
*, same internal view ; c, external view of mature lower molar ; tf, 
internal view of same. 3. Fang. 4. Horn. 
mutual attrition. There does not appear to have been any 
di-rmal armor. Several genera besides Iguanodon have 
been referred to this family, as Hypsilophodon, Scclido- 
vauruft, and others; its limits vary with different writers. 
iguanoid (i-gwau'oid), . and n. Same as 
ii/nHiiian. 
Iguvine (ig'u-viu), H. Same as Eugiibine. 
