cormo-combining form of Gr. κορµό-ς trunk of a tree, stem, taken as the basis of terms (chiefly proposed by Haeckel) referring to the evolution, etc., of races or social aggregates: as corˈmogeny[Gr. -γενεια descent], that branch of ontogeny which deals with the germ-history of races (or social aggregates: families, communities, etc.). corˈmophyly[Gr. ϕυλή, ϕῦλον set of men, tribe, race], that branch of phylogeny which deals with the tribal history of races. Also corˈmology, ‘the anatomy of the cormus’ (Syd. Soc.Lex.).1879tr.Haeckel's Evol. Man I. 24 Germ-history of races (or of social aggregates of persons: families, communities, states, etc.) Cormogeny.Ibid., Tribal history of races (or of social aggregates of persons: families, communities, states, etc.) Cormophyly.