[¦kē·mō‚dif·ə‚ren·chē′ā·shən] (embryology) The process of cellular differentiation at the molecular level by which embryonic cells become specialized as tissues and organs.
chemodifferentiation
che·mo·dif·fer·en·ti·a·tion
(kē'mō-dif'er-en-shē-ā'shŭn), Differentiation of the cellular chemical constituents in the embryo before cytodifferentiation; sometimes recognizable histochemically. Synonym(s): invisible differentiation