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Coleoptera :: Coleoptera (n. pl.) An order of insects having the anterior pair of wings (elytra) hard and horny, and serving as coverings for the posterior pair, which are membranous, and folded transversely under the others when not in use. The mouth parts form two pairs of jaws (mandibles and maxillae) adapted for chewing. Most of the Coleoptera are known as beetles and weevils..

Intermembranous :: Intermembranous (a.) Within or beneath a membrane; as, intermembranous ossification..

Perilymph :: Perilymph (n.) The fluid which surrounds the membranous labyrinth of the internal ear, and separates it from the walls of the chambers in which the labyrinth lies..

Sacculus :: Sacculus (n.) A little sac; esp., a part of the membranous labyrinth of the ear..

Croup :: Croup (n.) An inflammatory affection of the larynx or trachea, accompanied by a hoarse, ringing cough and stridulous, difficult breathing; esp., such an affection when associated with the development of a false membrane in the air passages (also called membranous croup). See False croup, under False, and Diphtheria..

Ampulla :: Ampulla (n.) Any membranous bag shaped like a leathern bottle, as the dilated end of a vessel or duct; especially the dilations of the semicircular canals of the ear..

Film :: Film (n.) A thin skin; a pellicle; a membranous covering, causing opacity; hence, any thin, slight covering..

Ascus :: Ascus (n.) A small membranous bladder or tube in which are inclosed the seedlike reproductive particles or sporules of lichens and certain fungi.

Cyst :: Cyst (n.) A pouch or sac without opening, usually membranous and containing morbid matter, which is accidentally developed in one of the natural cavities or in the substance of an organ..

Bunion :: Bunion (n.) An enlargement and inflammation of a small membranous sac (one of the bursae muscosae), usually occurring on the first joint of the great toe..

Lobated :: Lobated (a.) Furnished with membranous flaps, as the toes of a coot. See Illust. (m) under Aves..

Ligament :: Ligament (n.) A band of connective tissue, or a membranous fold, which supports or retains an organ in place; as, the gastrophrenic ligament, connecting the diaphragm and stomach..

Fontanel :: Fontanel (n.) One of the membranous intervals between the incompleted angles of the parietal and neighboring bones of a fetal or young skull; -- so called because it exhibits a rhythmical pulsation.

Endolymph :: Endolymph (n.) The watery fluid contained in the membranous labyrinth of the internal ear.

Membraneous :: Membraneous (a.) See Membranous.

Valve :: Valve (n.) One or more membranous partitions, flaps, or folds, which permit the passage of the contents of a vessel or cavity in one direction, but stop or retard the flow in the opposite direction; as, the ileocolic, mitral, and semilunar valves..

Allantoid :: Allantoid (n.) A membranous appendage of the embryos of mammals, birds, and reptiles, -- in mammals serving to connect the fetus with the parent; the urinary vesicle..

Scale :: Scale (n.) One of the small, thin, membranous, bony or horny pieces which form the covering of many fishes and reptiles, and some mammals, belonging to the dermal part of the skeleton, or dermoskeleton. See Cycloid, Ctenoid, and Ganoid..

Skin :: Skin (n.) The external membranous integument of an animal.

Tallow :: Tallow (n.) The suet or fat of animals of the sheep and ox kinds, separated from membranous and fibrous matter by melting..

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