operculum

As nouns the difference between osculum and operculum

is that osculum is the main opening in a sponge from which water is expelled while operculum is a covering flap or lidlike structure in plants and animals, such as a gill cover.

As nouns the difference between operculum and columella

is that operculum is a covering flap or lidlike structure in plants and animals, such as a gill cover while columella is (biology) any of various small structures in plants or animals that are columnar in shape.

As nouns the difference between opercle and operculum

is that opercle is (anatomy) any of the bony plates supporting the gill covers of fishes; an opercular bone while operculum is a covering flap or lidlike structure in plants and animals, such as a gill cover.

As nouns the difference between operculum and pharynx

is that operculum is a covering flap or lidlike structure in plants and animals, such as a gill cover while pharynx is (anatomy) the part of the alimentary canal that extends from the mouth and nasal cavities to the larynx, where it becomes continuous with the esophagus.

As nouns the difference between operculum and peristome

is that operculum is a covering flap or lidlike structure in plants and animals, such as a gill cover while peristome is (botany) one or two rings of tooth-like appendages surrounding the opening of the capsule of many mosses.

As a noun operculum

is a covering flap or lidlike structure in plants and animals, such as a gill cover.

As an adjective unoperculated is

without an operculum.

As a noun operculum

is a covering flap or lidlike structure in plants and animals, such as a gill cover.

As an adjective operculiferous is

(zoology) bearing an operculum.

As nouns the difference between operculum and opercular

is that operculum is a covering flap or lidlike structure in plants and animals, such as a gill cover while opercular is (anatomy) the principal opercular bone or operculum of fishes.

As an adjective opercular is

of or pertaining to the operculum.