(n.) An embryo sac or embryonal vesicle in the ovules of flowering plants.
(2):
(n.) One of the parts formed by fission in certain Protozoa. See Spore formation, belw.
(3):
(n.) One of the minute grains in flowerless plants, which are analogous to seeds, as serving to reproduce the species.
(4):
(n.) A minute grain or germ; a small, round or ovoid body, formed in certain organisms, and by germination giving rise to a new organism; as, the reproductive spores of bacteria, etc.