Homodont Hom"o·dont adjective [ Homo- + Greek ..., ..., a tooth.] (Anat.) Having all the teeth similar in front, as in the porpoises; -- opposed to heterodont .

Homodromal, Homodromous Ho·mod"ro·mal, Ho·mod"ro·mous adjective [ Homo- + Greek ... a course, running.] 1. (Botany) Running in the same direction; -- said of stems twining round a support, or of the spiral succession of leaves on stems and their branches. 2. (Mech.) Moving in the same direction; -- said of a lever or pulley in which the resistance and the actuating force are both on the same side of the fulcrum or axis.

Homodynamic Ho`mo·dy·nam"ic adjective Homodynamous. Quain.

Homodynamous Ho`mo·dy"na·mous adjective (Biol.) Pertaining to, or involving, homodynamy; as, successive or homodynamous parts in plants and animals.

Homodynamy Ho`mo·dy"na·my noun [ Greek ... of like power; ... the same + ... power.] (Biol.) The homology of metameres. See Metamere . Gegenbaur.

Homogamous Ho·mog"a·mous adjective [ Greek ... married together; ... the same + ... marriage.] (Botany) Having all the flowers alike; -- said of such composite plants as Eupatorium, and the thistels.

Homogamy Ho·mog"a·my noun (Botany) The condition of being homogamous.

Homogangliate Ho`mo·gan"gli·ate adjective [ Homo- + gangliate .] (Zoology) Having the ganglia of the nervous system symmetrically arranged, as in certain invertebrates; -- opposed to heterogangliate .

Homogene Ho"mo·gene adjective [ Confer French homogène .] Homogeneous. [ Obsolete] B. Jonson.

Homogeneal Ho`mo·ge"ne·al adjective Homogeneous.

Homogenealness Ho`mo·ge"ne·al·ness noun Homogeneousness.

Homogeneity Ho`mo·ge·ne"i·ty noun [ Confer French homogénéité .] Same as Homogeneousness .

Homogeneous Ho`mo·ge"ne·ous adjective [ Greek ...; ... the same + ... race, kind: confer French homogène . See Same , and Kin .] 1. Of the same kind of nature; consisting of similar parts, or of elements of the like nature; -- opposed to heterogeneous ; as, homogeneous particles, elements, or principles; homogeneous bodies. 2. (Alg.) Possessing the same number of factors of a given kind; as, a homogeneous polynomial.

Homogeneousness Ho`mo·ge"ne·ous·ness noun Sameness 9kind or nature; uniformity of structure or material.

Homogenesis Ho`mo·gen"e·sis noun [ Homo- + genesis .] (Biol.) That method of reproduction in which the successive generations are alike, the offspring, either animal or plant, running through the same cycle of existence as the parent; gamogenesis; -- opposed to heterogenesis .

Homogenetic Ho`mo·ge·net"ic adjective (Biol.) Homogenous; -- applied to that class of homologies which arise from similarity of structure, and which are taken as evidences of common ancestry.

Homogenous Ho·mog"e·nous adjective (Biol.) Having a resemblance in structure, due to descent from a common progenitor with subsequent modification; homogenetic; -- applied both to animals and plants. See Homoplastic .

Homogeny Ho·mog"e·ny noun [ Greek ...; ... the same + ... race, kind.] 1. Joint nature. [ Obsolete] Bacon. 2. (Biol.) The correspondence of common descent; -- a term used to supersede homology by Lankester, who also used homoplasy to denote any superinduced correspondence of position and structure in parts embryonically distinct (other writers using the term homoplasmy ). Thus, there is homogeny between the fore limb of a mammal and the wing of a bird; but the right and left ventricles of the heart in both are only in homoplasy with each other, these having arisen independently since the divergence of both groups from a univentricular ancestor.

Homogonous Ho·mog"o·nous adjective [ Greek .... See Homogeneous .] (Botany) Having all the flowers of a plant alike in respect to the stamens and pistils.

Homogony Ho·mog"o·ny noun (Botany) The condition of having homogonous flowers.

Homograph Hom"o·graph noun [ Greek "omo`grafos with the same letters; "omo`s the same + gra`fein to write.] (Philol.) One of two or more words identical in orthography, but having different derivations and meanings; as, fair , noun , a market, and fair , adjective , beautiful.

Homographic Ho`mo·graph"ic adjective 1. Employing a single and separate character to represent each sound; -- said of certain methods of spelling words. 2. (Geom.) Possessing the property of homography.

Homography Ho·mog"ra·phy noun 1. That method of spelling in which every sound is represented by a single character, which indicates that sound and no other. 2. (Geom.) A relation between two figures, such that to any point of the one corresponds one and but one point in the other, and vise versa. Thus, a tangent line rolling on a circle cuts two fixed tangents of the circle in two sets of points that are homographic.

Homoioptoton Ho·moi`op·to"ton noun [ New Latin , from Greek ... in a like case; ... like + ... falling.] (Rhet.) A figure in which the several parts of a sentence end with the same case, or inflection generally.

Homoiothermal Ho·moi`o·ther"mal adjective [ Greek ... like + English thermal .] (Physiol.) Maintaining a uniform temperature; hæmatothermal; homothermic; -- applied to warm- bodied animals, because they maintain a nearly uniform temperature in spite of the great variations in the surrounding air; in distinct from the cold-blooded ( poikilothermal ) animals, whose body temperature follows the variations in temperature of the surrounding medium.

Homoiousian Ho`moi·ou"si·an noun [ Greek ..., ..., of like substance; "o`moios + o'ysi`a the substance, being, essence.] (Eccl. Hist.) One of the semi-Arians of the 4th century, who held that the Son was of like, but not the same, essence or substance with the Father; -- opposed to homoousian .

Homoiousian Ho`moi·ou"si·an adjective Of or pertaining to Homoiousians, or their belief.

Homologate Ho·mol"o·gate transitive verb [ imperfect & past participle Homologated ; present participle & verbal noun Homologating .] [ Late Latin homologatus , past participle of homologare to homologate; Greek ... to assent, agree. See Homologous .] (Civ. Law) To approve; to allow; to confirm; as, the court homologates a proceeding. Wheaton.

Homologation Ho·mol`o·ga"tion noun [ Confer French homologation .] (Civ. & Scots Law) Confirmation or ratification (as of something otherwise null and void), by a court or a grantor.

Homological Ho`mo·log"ic·al adjective Pertaining to homology; having a structural affinity proceeding from, or base upon, that kind of relation termed homology . -- Ho`mo*log"ic*al*ly , adverb

Homologinic Ho·mol`o·gin"ic adjective (Chemistry) Pertaining to, or characterized by, homology; as, homologinic qualities, or differences.

Homologize Ho·mol"o·gize transitive verb (Biol.) To determine the homologies or structural relations of.

Homologon Ho·mol"o·gon noun [ New Latin ] See Homologue .

Homologoumena Hom`o·lo·gou"me·na noun plural [ New Latin , from Greek ... things conceded, past participle of ... to agree, admit, concede. See Homologous .] Those books of the New Testament which were acknowledged as canonical by the early church; -- distinguished from antilegomena .

Homologous Ho·mol"o·gous adjective [ Greek ... assenting, agreeing; ... the same + ... speech, discourse, proportion, ... to say, speak.] Having the same relative position, proportion, value, or structure. Especially: (a) (Geom.) Corresponding in relative position and proportion.

In similar polygons, the corresponding sides, angles, diagonals, etc., are homologous .

Davies & Peck (Math. Dict.). (b) (Alg.) Having the same relative proportion or value, as the two antecedents or the two consequents of a proportion. (c) (Chemistry) Characterized by homology; belonging to the same type or series; corresponding in composition and properties. See Homology , 3. (d) (Biol.) Being of the same typical structure; having like relations to a fundamental type to structure; as, those bones in the hand of man and the fore foot of a horse are homologous that correspond in their structural relations, that is, in their relations to the type structure of the fore limb in vertebrates. Homologous stimulus . (Physiol.) See under Stimulus .

Homolographic Hom`o·lo·graph"ic adjective [ Homo- + Greek "o`los whole + -graph + -ic ; but confer French homalographique , Greek ... even, level.] Preserving the mutual relations of parts, especially as to size and form; maintaining relative proportion. Homolographic projection , a method of constructing geographical charts or maps, so that the surfaces, as delineated on a plane, have the same relative size as the real surfaces; that is, so that the relative actual areas of the different countries are accurately represented by the corresponding portions of the map.

Homologue Hom"o·logue noun [ Confer French homologue . See Homologous .] That which is homologous to something else; as, the corresponding sides, etc., of similar polygons are the homologues of each other; the members or terms of an homologous series in chemistry are the homologues of each other; one of the bones in the hand of man is the homologue of that in the paddle of a whale.

Homology Ho·mol"o·gy noun [ Greek ... agreement. See Homologous .] 1. The quality of being homologous; correspondence; relation; as, the homology of similar polygons. 2. (Biol.) Correspondence or relation in type of structure in contradistinction to similarity of function; as, the relation in structure between the leg and arm of a man; or that between the arm of a man, the fore leg of a horse, the wing of a bird, and the fin of a fish, all these organs being modifications of one type of structure. » Homology indicates genetic relationship, and according to Haeckel special homology should be defined in terms of identity of embryonic origin. See Homotypy , and Homogeny . 3. (Chemistry) The correspondence or resemblance of substances belonging to the same type or series; a similarity of composition varying by a small, regular difference, and usually attended by a regular variation in physical properties; as, there is an homology between methane, CH ₄ , ethane, C ₂ H ₆ , propane, C ₃ H ₈ , etc., all members of the paraffin series. In an extended sense, the term is applied to the relation between chemical elements of the same group; as, chlorine, bromine, and iodine are said to be in homology with each other. Confer Heterology . General homology (Biol.) , the higher relation which a series of parts, or a single part, bears to the fundamental or general type on which the group is constituted. Owen. -- Serial homology (Biol.) , representative or repetitive relation in the segments of the same organism, -- as in the lobster, where the parts follow each other in a straight line or series. Owen. See Homotypy . -- Special homology (Biol.) , the correspondence of a part or organ with those of a different animal, as determined by relative position and connection. Owen.

Homomallous Ho·mom"al·lous adjective [ Homo- + Greek ... a lock of wool.] (Botany) Uniformly bending or curving to one side; -- said of leaves which grow on several sides of a stem.

Homomorphic, Homomorphous Ho`mo·mor"phic, Ho`mo·mor"phous adjective [ Greek ... the same + ... shape.] Characterized by homomorphism.

Homomorphism Ho`mo·mor"phism noun [ See Homomorphous .] 1. (Biol.) Same as Homomorphy . 2. (Botany) The possession, in one species of plants, of only one kind of flowers; -- opposed to heteromorphism , dimorphism , and trimorphism . 3. (Zoology) The possession of but one kind of larvæ or young, as in most insects.

Homomorphy Ho"mo·mor`phy noun [ Homo- + Greek ... form.] (Biol.) Similarity of form; resemblance in external characters, while widely different in fundamental structure; resemblance in geometric ground form. See Homophyly , Promorphology .

Homonomous Ho·mon"o·mous adjective (Biol.) Of or pertaining to homonomy.

Homonomy Ho·mon"o·my noun [ Homo- + Greek ... law.] (Biol.) The homology of parts arranged on transverse axes. Haeckel.

Homonym Hom"o·nym noun [ Confer French homonyme . See Homonymous .] A word having the same sound as another, but differing from it in meaning; as the noun bear and the verb bear . [ Written also homonyme .]

Homonymous Ho·mon"y·mous adjective [ Latin homonymus , Greek ...; ... the same + ..., for ... name; akin to English name .] 1. Having the same name or designation; standing in the same relation; -- opposed to heteronymous . 2. Having the same name or designation, but different meaning or relation; hence, equivocal; ambiguous.

Homonymously Ho·mon"y·mous·ly adverb 1. In an homonymous manner; so as to have the same name or relation. 2. Equivocally; ambiguously.

Homonymy Ho·mon"y·my noun [ Greek ...: confer French homonymie .] 1. Sameness of name or designation; identity in relations. Holland.

Homonymy may be as well in place as in persons.

Fuller. 2. Sameness of name or designation of things or persons which are different; ambiguity.

Homoousian Ho`mo·ou"si·an noun [ Greek ...; ... the same + ... being, essence, substance.] (Eccl. Hist.) One of those, in the 4th century, who accepted the Nicene creed, and maintained that the Son had the same essence or substance with the Father; -- opposed to homoiousian .

Homoousian Ho`mo·ou"si·an adjective Of or pertaining to the Homoousians, or to the doctrines they held.