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Having the same relative position, proportion, value, or structure. Especially:

A gaseous hydrocarbon, C3H4, homologous with acetylene; propine. CH3.C.CH

Methyl alcohol, CH3OH; -- also, by extension, any one in the homologous series of paraffine alcohols of which methyl alcohol is the type.

A radical, C16H33, not yet isolated, but supposed to exist in a series of compounds homologous with the ethyl compounds, and derived from spermaceti.

ohol (Chem.), a white, waxy, crystalline solid, obtained from spermaceti, and regarded as homologous with ordinary, or ethyl, alcohol; ethal; - - called also cetyl alcohol.

uth organs, terminated by a pincherlike claw, in scorpions and allied Arachnida. They are homologous with the falcers of spiders, and probably with the mandibles of insects.

A small organ at the upper part of the vulva, homologous to the penis in the male.

or, occuring in coal tar, Dippel's oil, tobacco smoke, etc., regarded as an organic base, homologous with pyridine. Also, one of a series of metameric compounds of which coridine is a type. [Written also corindine.]

issue and cartilage corpuscles. See Blood. Virchow showed that the corpuscles of bone are homologous with those of connective tissue. Quain's Anat. Red blood corpuscles (Physiol.), in man, yellowish, biconcave, circular discs varying from 1/3500 to 1/3200 of an inch in diameter and about 1/12400 of an inch thick. They…

A colorless liquid resembling phenol or carbolic acid, homologous with pyrocatechin, and obtained from beechwood tar and gum guaiacum. [Written also creasol.]

Any one of three metameric substances, CH3.C6H4.OH, homologous with and resembling phenol. They are obtained from coal tar and wood tar, and are colorless, oily liquids or solids.

A strong, liquid, organic base, C3H7.C6H4.NH2, homologous with aniline.

of oxalic acid. It is the first member of the fatty acids in the paraffin series, and is homologous with acetic acid.

ifferent elements, or of like elements in different proportions; different; -- opposed to homologous; as, heterologous organs. Heterologous stimulus. (Physiol.) See under Stimulus. -- Heterologous tumor (Med.), a tumor differing in structure from the normal tissues of the body.

are in heterology with each other, though each in at the same time a member of a distinct homologous series. Cf. Homology.

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.…

The quality of being homologous; correspondence; relation; as, the homologyof similar polygons.

The formation of homologous tissues.

A homologous or corresponding part or segment.

iving organism; metabolism. Vegetable metamorphosis (Bot.), the doctrine that flowers are homologous with leaf buds, and that the floral organs are transformed leaves.