One of the minute grains in flowerless plants, which are analogous to seeds, as serving to reproduce the species. (Bot.)
An embryo sac or embryonal vesicle in the ovules of flowering plants.
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. (Biol.)
Phrases & Compounds
Spore formation
A mode of reproduction resembling multiple fission, common among Protozoa, in which the organism breaks up into a number of pieces, or spores, each of which eventually develops into an organism like the parent form.