(cytology) The semipermeable membrane that surrounds the cytoplasm of a cell.

(physics, chemistry) a separation method in which a nonwetting, microporous membrane is used with a liquid feed phase on one side of the membrane and a condensing, permeate phase on the other

(chemistry, physics) any of several processes for separating the components of mixtures by using thin barriers between two miscible fluids; any transmembrane force leads to preferential transport of one or more feed components

Alternate spelling of nictitating membrane.

plural of nictating membrane

plural of Schneiderian membrane

(anatomy) The mucous membrane that lines the nasal chambers; the pituitary membrane.

plural of basement membrane

(anatomy) A layer of rod cells and cone cells in the retina of the human eye.

plural of tympanic membrane