the world > life > biology > biological processes > genetic activity > heredity or hereditary descent > [adjective] > production unlike parents > atavism (4)
Of or pertaining to a remote ancestor.
Biology. = reversionary, adj. 4. rare.
Biology. Relating to or involving reversion to an earlier type or form (cf. reversion, n.1 7c); atavistic. Also in extended use. Now rare.
Of or pertaining to atavism; atavic.