n. [ Cf. Gr. &unr_; to grow beside. See Para-, and -blast. ] (Biol.) A portion of the mesoblast (of peripheral origin) of the developing embryo, the cells of which are especially concerned in forming the first blood and blood vessels. C. S. Minot. [ 1913 Webster ]

a. (Biol.) Of or pertaining to the parablast; as, the parablastic cells. [ 1913 Webster ]