Heterology
(Het`er*ol"o*gy) n. [Hetero- + -logy.]
1. (Biol.) 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.
2. (Chem.) 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.
Heteromera
(||Het`e*rom"e*ra) n. pl. [NL., fr. Gr. other + part.] (Zoöl.) A division of Coleoptera, having
heteromerous tarsi.
Heteromerous
(Het`er*om"er*ous) a. [See Heteromera.]
1. (Chem & Crystallog.) Unrelated in chemical composition, though similar or indentical in certain other
respects; as, borax and augite are homœmorphous, but heteromerous.
2. (Bot.) With the parts not corresponding in number.
3. (Zoöl.) (a) Having the femoral artery developed as the principal artery of the leg; — said of certain
birds, as the cotingas and pipras. (b) Having five tarsal joints in the anterior and middle legs, but only
four in the posterior pair, as the blister beetles and oil beetles.
Heteromorphic
(Het`er*o*mor"phic) a. [Hetero- + Gr. form.] (Biol.) Deviating from the normal, perfect,
or mature form; having different forms at different stages of existence, or in different individuals of the
same species; — applied especially to insects in which there is a wide difference of form between the
larva and the adult, and to plants having more than one form of flower.
Heteromorphism
(Het`er*o*mor"phism Het`er*o*mor"phy) n. (Biol.) The state or quality of being heteromorphic.
Heteromorphous
(Het`er*o*mor"phous) a. (Biol.) Heteromorphic.
Heteromyaria
(||Het`e*ro*my*a"ri*a) n. pl. [NL., fr. Gr. other + a muscle.] (Zoöl.) A division of bivalve
shells, including the marine mussels, in which the two adductor muscles are very unequal. See Dreissena,
and Illust. under Byssus.
Heteronereis
(||Het`e*ro*ne*re"is) n. [NL. See Hetero-, and Nereis.] (Zoöl.) A free- swimming, dimorphic,
sexual form of certain species of Nereis.
In this state the head and its appendages are changed in form, the eyes become very large; more or
less of the parapodia are highly modified by the development of finlike lobes, and branchial lamellæ, and
their setæ become longer and bladelike.
Heteronomous
(Het`er*on"o*mous) a. [Hetero- + Gr. no`mos law.] Subject to the law of another.
Krauth-Fleming.
