Heterogamy noun [ See Heterogamous .]

1. (Botany) The process of fertilization in plants by an indirect or circuitous method; -- opposed to orthogamy .

2. (Biol.) That form of alternate generation in which two kinds of sexual generation, or a sexual and a parthenogenetic generation, alternate; -- in distinction from metagenesis , where sexual and asexual generations alternate. Claus & Sedgwick.

Heterogangliate adjective [ Hetero- + gangliate .] (Physiol.) Having the ganglia of the nervous system unsymmetrically arranged; -- said of certain invertebrate animals.

Heterogene adjective Heterogenous. [ Obsolete]

Heterogeneal adjective Heterogeneous.

Heterogeneity noun [ Confer French hétérogénéité .] The state of being heterogeneous; contrariety.

The difference, indeed the heterogeneity , of the two may be felt.

Coleridge.

Heterogeneous adjective [ Greek ...; ... + ... race, kind; akin to English kin : confer French hétérogène .] Differing in kind; having unlike qualities; possessed of different characteristics; dissimilar; -- opposed to homogeneous , and said of two or more connected objects, or of a conglomerate mass, considered in respect to the parts of which it is made up. -- Het`er*o*ge"ne*ous*ly , adverb -- Het`er*o*ge"ne*ous*ness , noun

Heterogeneous nouns (Gram.) , nouns having different genders in the singular and plural numbers; as, hic locus , of the masculine gender in the singular, and hi loci and hæc loca , both masculine and neuter in the plural; hoc cælum , neuter in the singular; hi cæli , masculine in the plural. -- Heterogeneous quantities (Math.) , such quantities as are incapable of being compared together in respect to magnitude, and surfaces and solids. -- Heterogeneous surds (Math.) , surds having different radical signs.

Heterogenesis noun [ Hetero- + genesis .]
1. (Biol.) Spontaneous generation, so called.

2. (Biol.) That method of reproduction in which the successive generations differ from each other, the parent organism producing offspring different in habit and structure from itself, the original form, however, reappearing after one or more generations; -- opposed to homogenesis , or gamogenesis .

Heterogenetic adjective (Biol.) Relating to heterogenesis; as, heterogenetic transformations.

Heterogenist noun (Biol.) One who believes in the theory of spontaneous generation, or heterogenesis. Bastian.

Heterogenous adjective (Biol.) Of or pertaining to heterogenesis; heterogenetic.

Heterogeny noun (Biol.) Heterogenesis.

Heterogonous adjective (Botany) Characterized by heterogony. -- Het`er*og"o*nous*ly , adverb

Heterogony noun [ Hetero- + Greek ... offspring.] (Botany) The condition of having two or more kinds of flowers, different as to the length of their stamens and pistils.

Heterographic adjective [ See Heterography .] Employing the same letters to represent different sounds in different words or syllables; -- said of methods of spelling; as, the ordinary English orthography is heterographic .

Heterography noun [ Hetero- + -graphy .] That method of spelling in which the same letters represent different sounds in different words, as in the ordinary English orthography; e. g., g in get and in ginger .

Heterogynous adjective [ Hetero- + Greek ... a woman, female.] (Zoology) Having females very unlike the males in form and structure; -- as certain insects, the males of which are winged, and the females wingless.

Heterologous adjective [ Hetero- + Greek ... proportion.] Characterized by heterology; consisting of different elements, or of like elements in different proportions; different; -- opposed to homologous ; as, heterologous organs.

Heterologous stimulus . (Physiol.) See under Stimulus . -- Heterologous tumor (Medicine) , a tumor differing in structure from the normal tissues of the body.

Heterology noun [ 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. (Chemistry) 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. Confer Homology .

Heteromera noun plural [ New Latin , from Greek ... other + ... part.] (Zoology) A division of Coleoptera, having heteromerous tarsi.

Heteromerous adjective [ 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. (Botany) With the parts not corresponding in number.

3. (Zoology) (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 adjective [ Hetero- + Greek ... 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, Heteromorphy noun (Biol.) The state or quality of being heteromorphic.

Heteromorphous adjective (Biol.) Heteromorphic.

Heteromyaria noun plural [ New Latin , from Greek ... other + ... a muscle.] (Zoology) 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 noun [ New Latin See Hetero- , and Nereis .] (Zoology) 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 adjective [ Hetero- + Greek no`mos law.] Subject to the law of another. Krauth-Fleming.

Heteronomy noun
1. Subordination or subjection to the law of another; political subjection of a community or state; -- opposed to autonomy .

2. (Metaph.) A term applied by Kant to those laws which are imposed on us from without, or the violence done to us by our passions, wants, or desires. Krauth- Fleming.

Heteronym noun That which is heteronymous; a thing having a different name or designation from some other thing; -- opposed to homonym .

Heteronymous adjective [ Hetero- + Greek "o`nyma , for "o`noma a name.] Having different names or designations; standing in opposite relations. J. Le Conte.

-- Het"er*on"y*mous*ly , adverb

Heteroousian adjective [ Hetero- + Greek ... being, essence.] Having different essential qualities; of a different nature.

Heteroousian noun (Eccl. Hist.) One of those Arians who held that the Son was of a different substance from the Father.

Heteroousious adjective See Heteroousian .

Heteropathic adjective [ Hetero- + Greek ... suffering, from ..., ..., to suffer.] Of or pertaining to the method of heteropathy; allopathic.

Heteropathy noun [ See Heteropathic .] (Medicine) That mode of treating diseases, by which a morbid condition is removed by inducing an opposite morbid condition to supplant it; allopathy.

Heteropelmous adjective [ Hetero- + Greek ... the sole of the foot.] (Anat.) Having each of the two flexor tendons of the toes bifid, the branches of one going to the first and second toes; those of the other, to the third and fourth toes. See Illust. in Append.

Heterophagi noun plural [ New Latin , from Greek ... other + ... to eat.] (Zoology) Altrices.

Heterophemist noun One liable to the fault of heterophemy.

Heterophemy noun [ Hetero- + Greek ... voice, speech, from ... to speak.] The unconscious saying, in speech or in writing, of that which one does not intend to say; -- frequently the very reverse of the thought which is present to consciousness. R. G. White.

Heterophony noun [ Hetero- + Greek ... voice.] (Medicine) An abnormal state of the voice. Mayne.

Heterophyllous adjective [ Greek ... other + ... leaf: confer French hétérophylle .] (Botany) Having leaves of more than one shape on the same plant.

Heteroplasm noun [ Hetero- + Greek ... anything formed or molded.] An abnormal formation foreign to the economy, and composed of elements different from those are found in it in its normal condition. Dunglison.

Heteroplastic adjective [ Hetero- + -plastic .] (Biol.) Producing a different type of organism; developing into a different form of tissue, as cartilage which develops into bone. Haeckel.

Heteropod noun [ Confer French hétéropode .] (Zoology) One of the Heteropoda. -- adjective Heteropodous.

Heteropoda noun plural [ New Latin , from Greek ... other + -poda .] (Zoology) An order of pelagic Gastropoda, having the foot developed into a median fin. Some of the species are naked; others, as Carinaria and Atlanta , have thin glassy shells.

Heteropodous adjective (Zoology) Of or pertaining to the Heteropoda.

Heteropter noun One of the Heteroptera.

Heteroptera noun plural [ New Latin , from Greek ... other + ... a wing.] (Zoology) A suborder of Hemiptera, in which the base of the anterior wings is thickened. See Hemiptera .

Heteroptics noun [ Hetero- + optics .] False optics. Spectator.

Heteroscian noun [ Greek ...; ... other + ... shadow: confer French hétéroscien .] One who lives either north or south of the tropics, as contrasted with one who lives on the other side of them; -- so called because at noon the shadows always fall in opposite directions (the one northward, the other southward).

Heterosis noun [ New Latin , from Greek ... alteration, from ... other, different.] (Rhet.) A figure of speech by which one form of a noun, verb, or pronoun, and the like, is used for another, as in the sentence: "What is life to such as me ?" Aytoun.