HOMOLOGOUS

adj. Ho-mo2l'o-gu . Lat.. homolog us (from 6/xos. common, and Adyos, understanding). Fr., homologue, homolog i que. Qer.,homolog. 1. Like a given standard or object; having one name or type; constructed on the same fundamental plan. 2. In botany, corresponding morphologically (said of parts). [B, 19 (a, 24).] 3. In chemistry, arranged in a series, each member of which bears to the preceding member a constant, definite relation as regards either atomic composition, molecular weight, or some other well-marked chemical property. Such a series is called an h. series and is to be found especially among the hydrocarbons and their derivatives, each member in this case differing from the preceding member by the constant increment CH?. [BJ 4. In zoology, structurally related; having structural affinity. Opposed to analogous, which implies similarity of appearance, purpose, or use without corresponding affinity. [L, 343.] 5. Of neoplasms, composed of ti ue resembling some normal ti ue of the body, or, in a narrower sense, the normal ti ue of the part affected. [D, 3.] [s. 353]