资料来源 : pyDict

原胚

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Proembryo \Pro*em"bry*o\, n. [Pref. pro- + embryo. ] (Bot.)
   (a) The series of cells formed in the ovule of a flowering
       plant after fertilization, but before the formation of
       the embryo.
   (b) The primary growth from the spore in certain cryptogamous
       plants; as, the proembryo, or protonema, of mosses.