Spore

One of the minute grains in flowerless plants, which are analogous to seeds, as serving to reproduce the species.

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.

One of the parts formed by fission in certain Protozoa. See Spore formation, belw.

a small usually single-celled asexual reproductive body produced by many nonflowering plants and fungi and some bacteria and protozoans and that are capable of developing into a new individual without sexual fusion; "a sexual spore is formed after the fusion of gametes"