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Heterology :: Heterology (n.) The connection or relation of bodies which have partial identity of composition, but different characteristics and properties; the relation existing between derivatives of the same substance, or of the analogous members of different series; as, ethane, ethyl alcohol, acetic aldehyde, and acetic acid are in heterology with each other, though each in at the same time a member of a distinct homologous series. Cf. Homology..

Homodermy :: Homodermy (n.) Homology of the germinal layers.

Homodynamy :: Homodynamy (n.) The homology of metameres. See Metamere.

Homology :: Homology (n.) The quality of being homologous; correspondence; relation; as, the homologyof similar polygons..

Homogeny :: Homogeny (n.) 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

Homologinic :: Homologinic (a.) Pertaining to, or characterized by, homology; as, homologinic qualities, or differences..

Homotypy :: Homotypy (n.) A term suggested by Haeckel to be instead of serial homology. See Homotype.

Homologous :: Homologous (a.) Characterized by homology; belonging to the same type or series; corresponding in composition and properties. See Homology, 3..

Homological :: Homological (a.) Pertaining to homology; having a structural affinity proceeding from, or base upon, that kind of relation termed homology..

Heterology :: Heterology (n.) The absence of correspondence, or relation, in type of structure; lack of analogy between parts, owing to their being composed of different elements, or of like elements in different proportions; variation in structure from the normal form; -- opposed to homology..

Intermembral :: Intermembral (a.) Between members or limbs; as, intermembral homology, the correspondence of the limbs with each other..

Homonomy :: Homonomy (n.) The homology of parts arranged on transverse axes.

Homaxonial :: Homaxonial (a.) Relating to that kind of homology or symmetry, the mathematical conception of organic form, in which all axes are equal. See under Promorphology..

Homology :: Homology (n.) 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, CH4, ethane, C2H6, propane, C3H8, 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

Homophyly :: Homophyly (n.) That form of homology due to common ancestry (phylogenetic homology), in opposition to homomorphy, to which genealogic basis is wanting..

Homology :: Homology (n.) 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..

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