The membrane complex enveloping the cells of certain plankton including diatoms and dinoflagellates.
A case for the corporal cloth used in the Eucharist.
The pollen-producing organ usually found in pairs and forming an anther.
The twin layers of cells surrounding the basal lamina of an ovarian follicle.
The calcareous wall of a corallite, the exoskeleton of a coral polyp.
Any external case or sheath.
The larger of the two fluid-filled cavities forming part of the membranous labyrinth in the vertebrate inner ear (the other being the saccule) and into which the semicircular canals open. It contains hair cells and otoliths which send signals to the brain concerning the orientation of the head.
A dry indehiscent one-seeded fruit with thin membranous pericarp, similar to an achene and found in the beet and dock plants.