Homogenea 
Cuvier's system of classification, the second or- 
der of Infusoria or Aitiiuiilculti : approximately 
equivalent to 1'rotozoa, though including some 
Infusoria proper, as Urceolaria, with Cercariii 
(Spermatozoa), Vibrio, Proteus, Monns, Toll-ox, 
etc. It is thus a heterogeneous group, like the 
Polygastrica of Ehrenberg. 2. [?. c.] Plural 
of homogeiieum. 
homogeneal (ho-mo-je'ne-al), a. [As homogene- 
ous + -al.] Homogeneous. 
Things simply pure are inconsistent in the masse of na- 
ture, nor are the elements or humors in Mans Body exact- 
ly homageneall. Milton, Reformation in Eng., ii. 
A homogeneal existence. Longfellow, Hyperion, II. vi. 
Homogenei (ho-mo-je'ne-i), n. pi. [NL., masc. 
pi. of homogeneity : see homogeneous."} An or- 
der of lichens proposed by Acharius (1810), in- 
cluding the genera Lecitlea, Opegrapha, Cali- 
cium, etc., now referred to various orders. 
homogeneity (ho"ino-je-ne'i-ti), n. [= F. ho- 
mogeneite = Sp. homogeiieidad = Pg. iiomoyv- 
ueidade = It. omogeneita; as homogene-ous + 
-ity.] The state or character of being homoge- 
neous; likeness or correspondence of parts or 
qualities ; composition from like parts ; agree- 
ment in elements or characteristics ; congruity 
of constitution. 
They appear, as they become more minute, to be reduced 
to a homogeneity and simplicity of composition which al- 
most excludes them from the domain of animal life. 
Whewett. 
Law of homogeneity, in /;/., the principle that only 
magnitudes of the same kind can be added together. 
This is laid down by Vieta, but is not admitted by mod- 
em mathematicians. Principle Of homogeneity, in 
logic and metaph., the proposition that no two conceiva- 
ble things can be without any similarity. 
The three principles of Homogeneity, of Specification, 
and of Continuity or Affinity, as is now sufficiently evident, 
have a peculiar position in our intellectual constitution. 
/;. Caird, Philos. of Kant, p. 658. 
homogeneous (ho-mo-je'ne-us), a. [< F. homo- 
gene; = Sp. homogeneo = Pg. homogeneo = It. 
omogeneo, < NL. homogeneus, < Gr. t>ftoytvrif, of 
the same race, family, or kind, < ou6f, the same, 
+ ytvo$, race, family, kind: seegentts.] 1. Of 
the same kind ; essentially like ; of the same na- 
ture : said especially of parts of one whole : op- 
posed to heterogeneous. 
Every concept contains other concepts under it ; and 
therefore, when divided proxlmately, we descend always 
to other concepts, but never to individuals ; in other 
words, things the most homogeneous similar must in 
certain respects be heterogeneous dissimilar. 
Sir W. Hamilton, Logic (1874), I. 210. 
2. Having parts of only one kind ; composed of 
similar parts or congruous elements. See hete- 
rogeneous. 
If a series of rays of homogeneous light, travelling in 
homogeneous isotropic media, be at any place normal U> 
a wave-front, they will possess the same property after 
any number of reflections and refractions. 
Tail, Light, 216. 
Homogeneous coordinates. See coordinate. Homo- 
geneous equation, function, light, number, pro- 
duct, strain, etc. See the nouns. Homogeneous steel. 
Same as cant-steel. =Syn. Cognate, kindred, allied, akin, 
uniform; congenial. 
homogeneously (ho-mo-je'ne-us-li), adv. In a 
homogeneous manner; iu the same or an ac- 
cordant way ; so as to be homogeneous. 
homogeneousness (ho-mo-je'ne-us-nes), n. 
Same as homogeneity. 
hpmogenesis (ho-mo-jen'e-sis), n. [NL., < Gr. 
6u6f, the same, + ylveaif, birth: see genesis."] 
In biol., the ordinary course of generation, in 
which the offspring is like the parent and runs 
through the same cycle of development. It 
contrasts with certain special modes of genera- 
tion, as heterogenesis, xenogenesis, parthenogene- 
sis, etc. 
homogenetic (h6 y m6-je-net'ik), a. [< homo- 
genesis: see genetic.] 1. Of, pertaining to, or 
characterized by homogenesis; passing through 
the same cycle of existence as the parent. 2. 
Having a common origin; derived from the 
same structure, however variously modified, as 
organs or parts of any two or more animals : 
synonymous with homologous in its biological 
sense, and distinguished from liomoplastic. 
On the use of the term homology in modern zoology 
and the distinction between homogenetic and liomoplastic 
agreements. 
E. R. Lanlretter, Ann. and Mag. Nat. Hist., 1870. 
hoinogeneum (ho-mo-je'ne-um), n. ; pi. homo- 
genea (-a). [NL., neut. of homogeneus: see 
homogeneous.] Something homogeneous Ho- 
mogeneum adfectionls, in alg., a term of an algebraic 
equation containing the unknown, but not to the highest 
power. Homogeneum comparationls, the negative of 
the absolute term of an algebraic equation. 
homogenize (ho-moj'e-mz), v . t. ; pret. and pp. 
homogenized, ppr. homogenizing. [< Jiomogcne 
2868 
+ -ize.] To make homogeneous; mix evenly, as 
several ingredients ; reduce to an even standard. 
The whole island would have become homogenized by 
the action of strong centripetal forces. 
Fortnightly Rer., N. 8., XL. 201. 
homogenous (ho-moj'e-nus), a. [Var. of homo- 
geneous,'] Having the same origin; derived 
from the same source; homogenetic: distin- 
guished from homoplastic. 
honiogeny (ho-moj'e-ni), n. [< Gr. ouoyiveta, 
community of origin, < bpnyevfjf, of the same 
race or family: see homogeneous.] 1. Same- 
ness of nature or kind. 
The fifth [means to induce and accelerate putrefaction] 
is, either by the exhaling, or by the driving back of the 
principall spirits, which preserve the consistence of the 
body ; so that when their government is dissolved, every 
part returoeth to his nature, or homogeny. 
Bacon, Nat. Hist, 333. 
2. In biol., descent from a common ancestor; 
blood-relationship among animals. The term is 
used by Lankester in distinction from homoplasy, and as 
synonymous with homology in an ordinary sense. 
homogenous (ho-mog'o-nus), a. [< Gr. tuof, 
similar, + jovof, offspring.] In bpt., having sta- 
mens and pistils of the same height in individ- 
uals of the same species, as some hermaphro- 
dite flowers : same as homostyled, and opposed 
to dimorphous. Compare heterogonous. Asa 
Gray, 1877. 
homogony (ho-mog'o-ni), n. [< homogott-ous + 
-y.] The condition or state of being homoge- 
nous. 
homograph (ho'mo-graf), n. [< Gr. o/i6-)paipos, 
of the same letters (cf. ouoypaijieiv, write in the 
same manner), < 6u6f, the same, + ypa^n, a 
writing, < -)pa<f>civ, write.] In philol., a word 
which has exactly the same form as another, 
though of a different origin and signification : 
thus, base the adjective and base the noun, fair 
the adjective and/atrthe noun, are homographs. 
See homonym. 
homographic (ho-mo-graf'ik), a. [< Gr. 6u6f, 
the same, + ypatfi, a writing (see homograph), 
+ -4c.~\ 1. In geom., having the same anhar- 
monic ratio or system of anharmonic ratios; 
capable of being brought into coincidence by 
a series of central projections upon planes ; so 
related, as two figures, that to any point in one 
(without exception) only one point in the other 
corresponds, and vice versa, while to points sit- 
uated in a line in either figure correspond col- 
linear points in the other. 2. In orthography, 
relating to homography; employing the same 
character at all times and in all circumstances 
to represent the same sound: as, a homographic 
alphabet Homographic transformation, a trans- 
formation between homographic figures. 
homography (ho-mog'ra-fi),. [Ashomograph-ic 
+ -y7] 1. In orthography, the representation 
of each sound by a distinctive character, which 
is employed for that sound alone. 2. In geom., 
the relation between homographic figures. 
homohedral (ho-mo-he'dral), a. [< Gr. o//oe- 
rfpof, having a like seat (base), < 6/10$, the same, 
+ eipa, a seat, base.] Having equal or like 
sides; holohedral. 
Homohedral or holohedral forms are those which, like 
the cube and octohedron, possess the highest degree of 
symmetry of which the system admits. 
W. A. Killer, Elem. of Chem., 82. 
homoiomerous (ho-moi-om'e-rus), a. See ho- 
maomerous. 
homoiousian (ho-moi-o'si-an), a. and n. 
[Prop., according to the L. transliteration, *ho- 
meeusian, but the accepted form rests directly 
upon the Gr.; < LGr. 6ftoioraio(, of like nature or 
substance, < ofiotof, like, similar, + ovoia, being, 
< liv, fern, ovoa, being, ppr. of tlvat = L. esse, 
be: see fee 1 , entity, ontology. Cf. homoovsian.'] 
I. a. 1. Having a similar nature. 2. [o7>.] 
Relating to the Homoiousians or their belief. 
H. n. [cap.] One of the Semi-Arians, follow- 
ers of Eusebius, who maintained that the nature 
of Christ is similar to, but not the same with, 
that of the Father : opposed to Homoousian. 
hompiozoic (ho-moi-o-zo'ik), a. Same as homa;- 
ozoic. 
homolateral (ho-mo-lat'e-ral), a. [< Gr. 6/t6f, 
the same, + L. latus (later-), side.] 1. Same 
as homohedral. 2. Being on the same side. 
homologa, . Plural of homologon. 
homologal (ho-mol'o-gal), a. [As homolog-ous 
+ -al.] Agreeable, or like one another. Hal- 
ley, 1731. 
homologate (ho-mol'o-gat), v. t. ; pret. and pp. 
homologated, ppr. homologating. [< ML. hoino- 
logatits, pp. of homologare (> It. omologare = Sp. 
Pg. homologar = F. homologuer), < Gr. &/to)j>yfiv, 
homologne 
agree, admit, assent, < o/w/.oyoe, agreeing: see 
homologous."] To approve; allow; establish; 
ratify. 
We may take the Doctor's facts without homologating his 
conclusions. Dr. J. JBroirn, Spare Hours, 3d ser., p. 227. 
I do not, therefore, homologate everything which they 
have written both on the great Pyramid subject and any- 
thing else. Piazzi Smyth, Pyramid, p. 178. 
homologation (ho-mol-o-ga'shou), . [= F. 
homologation = Sp. homologacion = Pg. homolo- 
gagao == It. omolot/azione, < ML. as if *homologa- 
tio(n-), < homologare, homologate : see homolo- 
gate.] The act of homologating ; approval; rat- 
ification ; confirmation. Specifically, in Scot* law, a 
technical expression signifying an acj by which a person 
approves a deed, the effect of which approbatory act is to 
render that deed, though itself defective, binding upon the 
person by whom it is homologated, 
homological (ho-mo-loj'i-kal), o. [< homology 
+ -ic-al.] 1. Pertaining to or characterized 
by homology; having a structural affinity : dis- 
tinguished from analogical, and opposed to 
adaptive. See homology. 
1 have . . . treated the metamorphoses at greater 
length than I should otherwise have done, on account of 
the great importance of arriving at a correct homological 
interpretation of the different parts of the mature animal. 
Darurin, Cirripedia, p. 25. 
2. In geom., being in homology or plane per- 
spective, as two figures in one plane. 
homologically (ho-mo-loj'i-kal-i), adv. In a 
homological manner or sense ; by means of ho- 
mologies: distinguished from analogically. 
homologize (ho-mol'o-jiz), v. ; pret. and pp. 
homologized, ppr. homologizing. [< homolog-ous 
+ -ize.] I. trans. To make homologous ; make 
out or demonstrate the correspondence of. See 
homologous. 
In the great class of mollusks, though we can homolo- 
gizf the parts of one species with those of another, we can 
indicate but few serial homolpgies. 
Darwin, Origin of Species, p. 381. 
The parts of the segments of the cranium may be now 
more or less completely parallelized or homulogizcd with 
each other. K. D. Cope, Origin of the Fittest, p. 181. 
II. intrans. To be homologous ; specifically, 
in biol.j to correspond iu structural position, 
either in different bodies or in parts of the 
same body: as, the maxillee of insects homol- 
ogize with the legs, the wings of a bird with 
the arms of a man, etc. 
Two ventricles occur in the cerebrum of Scylllum, 
Rhina, and Acanthias which homologite with the lateral 
ventricles in the cerebrum of Mammalia. 
Nature, XXXIII. 333. 
homologon (ho-mol'o-gon), n. ; pi. homologous, 
homologa (-gonz, -ga). [< Gr. o/iotoyav, neut. of 
6u6^oyof, agreeing: see homologous.] Some- 
thing that corresponds to or agrees with an- 
other ; a thing or an event that is essentially a 
repetition of another. 
One of the curious homologous of history is this repeti- 
tion in Europe of the course of events in Asia. 
J. F. Clarke, Ten Great Religions, i. 4. 
homologous (ho-mol'o-gus), a. [= F. homologne 
= Sp. homologo = Pg. homologo = It. omologo, (. 
NL. homologus. < Gr. o//<i/o}'of, agreeing, cor- 
respondent, < o[io$, the same, + '/iytiv, speak, 
> ?.<i}'of, proportion, etc.] Having the same 
relative position, proportion, value, or struc- 
ture ; having correspondence or likeness. Spe- 
cifically (o) In geom., corresponding in relative position 
and proportion ; also, homological or in homology. (!>} 
In alg., having the same relative proportion or value, as 
the two antecedents or the two consequents of a proportion, 
(cl In chem., being of the same chemical type or series; 
differing by a multiple or an arithmetical ratio in certain 
constituents, while the physical qualities are analogous, 
with small differences, as if corresponding to a series of 
parallels : as, the species in the several groups of alcohols, 
fatty acids, and aromatic acids are homologous with the 
others in the same group. (<l) In zool. and bat., corre- 
sponding in type of structure ; having like relations to a 
fundamental type. Thus, the human arm, the fore leg 
of a horse, the wing of a bird, and the swimming-paddle 
of a dolphin or whale, being all composed essentially of 
the same structural elements, are said to be homologous, 
though they are adapted for quite different functions. 
All physiologists admit that the swim-bladder is homol- 
ogous, or ideally similar" in position and structure, with 
the lungs of the higher vertebrate animals. 
Darjcin, Origin of Species, p. 183. 
The tissues themselves, in some cases of dissimilar 
structure, may be homologous, but they are homologous 
tissues, and not homologous parts of a system of tissues. 
Besxey, Botany, p. 120. 
homolographic (ho-mol-o-graf'ik), a. [< Gr. 
6/idf, the same, + b/'.of, whole, + ypaQeiv, write.] 
Maintaining or exhibiting the true proportions 
of parts; preserving true relative areas Ho- 
molographic projection, a method of laying down por- 
tions of the earth's surface on a map or chart so that equal 
areas on the sphere are represented by equal areas on the 
map. 
homologue (ho'mo-log), n. [< F. homoloyuc, < 
Gr. o(i6/.o-)of. see homologous.] That which is 
