In biology, operculum (Latin for "little lid") has been used to describe several different anatomical features, in animals, in humans and even in plants. The following list gives some of the uses of the term:Operculum (gastropod), a lid on the shell of some gastropodsOperculum (bryozoa), a lid on the orifice of some bryozoansOperculum (incense ingredient), made from the operculum of gastropodsOperculum (fish), a flap of the bony fish covering the gillsOperculum (botany), various lids and flaps p… (More on Operculum)