OPERCULUMS
Definition
OPERCULUMS is the plural of OPERCULUM.
noun OPERCULUM: a hard flap serving as a cover for (a) the gill slits in fishes or (b) the opening of the shell in certain gastropods when the body is retracted.
OPERCULUMS is the plural of OPERCULUM.
noun OPERCULUM: a hard flap serving as a cover for (a) the gill slits in fishes or (b) the opening of the shell in certain gastropods when the body is retracted.