Index of English words, starting with "sp"

(1) - Sporangium (n.) A spore case in the cryptogamous plants, as in ferns, etc.

(1) - Spore (n.) One of the parts formed by fission in certain Protozoa. See Spore formation, belw.
(2) - Spore (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.
(3) - Spore (n.) An embryo sac or embryonal vesicle in the ovules of flowering plants.
(4) - Spore (n.) One of the minute grains in flowerless plants, which are analogous to seeds, as serving to reproduce the species.