What is "gonidium"

Gonidium \Go*nid"i*um\, n. [NL., fr. Gr. ?, dim. of ? angle.] (Zool.) A special groove or furrow at one or both angles of the mouth of many Anthozoa.

Gonidium \Go*nid"i*um\, n.; pl. Gonidia. [NL., fr. Gr. ? that which generates.] (Bot.) A component cell of the yellowish green layer in certain lichens.

n. 1 (context lichenology phycology English) A photosynthetic algal cell in the thallus of a lichen; a similar asexual reproductive cell in some algae. 2 (context zoology English) A special groove or furrow at one or both angles of the mouth of many Anthozoa.

A gonidium (plural gonidia) is an asexual reproductive cell or group of cells, especially in algae.