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The membrane of fibrous connective tissue which closely invests cartilage, except where covering articular surfaces.

The membrane of fibrous connective tissue which closely invests all bones except at the articular surfaces.

A chitinous membrane covering the exterior of many shells; -- called also epidermis.

The membrane surrounding the mouth of an invertebrate animal.

The smooth serous membrane which lines the cavity of the abdomen, or the whole body cavity when there is no diaphragm, and, turning back, surrounds the viscera, forming a closed, or nearly closed, sac. [Written also peritonæum.]

ially of a resonant vessel, usually of paraboloidal form, closed at one end by a flexible membrane. A stylus attached to some point of the membrane records the movements of the latter, as it vibrates, upon a moving cylinder or plate.

Of or pertaining to Phyllorhina and other related genera of bats that have a leaflike membrane around the nostrils.

Any bat of the genus Phyllostoma, or allied genera, having large membranes around the mouth and nose; a nose-leaf bat.

The delicate and highly vascular membrane immediately investing the brain and spinal cord.

Having the toes bordered by membranes; fin-footed, as certain birds.

Secreting mucus or phlegm; as, the pituitary membrane, or the mucous membrane which lines the nasal cavities.

The smooth serous membrane which closely covers the lungs and the adjacent surfaces of the thorax; the pleural membrane.

Of or pertaining to the pleural and peritoneal membranes or cavities, or to the pleuroperitoneum.

The pleural and peritoneal membranes, or the membrane lining the body cavity and covering the surface of the inclosed viscera; the peritoneum; -- used especially in the case of those animals in which the body cavity is not divided.

ound in the nose, uterus, etc., and produced by hypertrophy of some portion of the mucous membrane.

One of the minute orifices in an animal or vegetable membrane, for transpiration, absorption, etc.

Having the power to produce a purple color; as, the purpurogenous membrane, or choroidal epithelium, of the eye. See Visual purple, under Visual.

A part reflected, or turned back, at an angle; as, the reflection of a membrane.

The second stomach of ruminants, in which folds of the mucous membrane form hexagonal cells; -- also called the honeycomb stomach.

The delicate membrane by which the back part of the globe of the eye is lined, and in which the fibers of the optic nerve terminate. See Eye.