In reference to breeding or lineage: of unmixed origin or descent; pure-bred.

Without cross-breeding; without variation in one or more desired or characteristic traits.

Originally: designating a horse of pure breed or stock. In later use chiefly: designating a horse of the thoroughbred breed (see sense B. 1a); of…

(esp. of a horse) of pure breed; cf. full-blood, adj.

Biology. Having a single common origin; monophyletic. Cf. monogenetic, adj. 4. Obsolete. rare.

Biology. Of or relating to common evolutionary origin or ancestry.

Biology and Ethnology. Having a single common origin, monophyletic; of or relating to monogenism. Now only in extended use (rare).

Having a common descent or origin; applied by Ray Lankester to organs or parts of different organisms which, however variously modified, show a…

of, relating to, or having reference to, homogeny or community of descent.

Biology. = homogenetic, adj. 1.

Of a group or taxon: descended from a common evolutionary ancestor or ancestral group; (also, esp. in cladistics) including all and only the…

of pure stock, thoroughbred.

= homophylic adj.

belonging to the same race; relating to homophyly.

belonging to the same system.

produced by line-breeding.

descended from a common ancestor or ancestors.

Based on or employing the concept of a clade or the ideas of cladistics; devised in accordance with cladistics.