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stant discharge; a deep, narrow, chronic abscess; an abnormal opening between an internal cavity and another cavity or the surface; as, a salivary fistula; an anal fistula; a recto-vaginal fistula. Incomplete fistula (Med.), a fistula open at one end only.

orm of a ferry dock. -- Floating cartilage (Med.), a cartilage which moves freely in the cavity of a joint, and often interferes with the functions of the latter. -- Floating dam. (a) An anchored dam. (b) A caisson used as a gate for a dry dock. -- Floating derrick, a derrick on a float for river and harbor use, in…

The motion or undulation of a fluid collected in a natural or artifical cavity, which is felt when it is subjected to pressure or percussion. Dunglison.

A small cavity, tubular depression, or sac; as, a hair follicle.

oramen of Winslow (Anat.), the opening connecting the sac of the omentum with the general cavity of the peritoneum.

A pit, groove, cavity, or depression, of greater or less depth; as, the temporal fossa on the side of the skull; the nasal fossæ containing the nostrils in most birds.

erforming the functions, both of digestive and circulatory organs; as, the gastrovascular cavity of coelenterates.

e to a double-walled sac, with one opening or mouth (the blastopore) which leads into the cavity (the archenteron) lined by the inner wall (the hypoblast). See Illust. under Invagination. In a more general sense, an ideal stage in embryonic development. See Gastræa. -- a.

A nodule of stone, containing a cavity, lined with crystals or mineral matter.

Having the form of a smooth and shallow depression; sockas, the glenoid cavity, or fossa, of the scapula, in which the head of the humerus articulates.

A form of union or immovable articulation where a hard part is received into the cavity of a bone, as the teeth into the jaws.

The act of scooping out with a gouge, or as with a gouge; a groove or cavity scooped out, as with a gouge.

Magdeburg hemispheres (Physics), two hemispherical cups forming, when placed together, a cavity from which the air can be withdrawn by an air pump; -- used to illustrate the pressure of the air. So called because invented by Otto von Guericke at Magdeburg.

An effusion of blood into the cavity of the pleura.

A protrusion, consisting of an organ or part which has escaped from its natural cavity, and projects through some natural or accidental opening in the walls of the latter; as, hernia of the brain, of the lung, or of the bowels. Hernia of the abdominal viscera in most common. Called also rupture. Strangulated hernia, a…

A hollow place or cavity; an excavation; a pit; an opening in or through a solid body, a fabric, etc.; a perforation; a rent; a fissure. The holes where eyes should be. Shak. The blind walls Were full of chinks and holes. Tennyson. The priest took a chest, and bored a hole in the lid. 2 Kings xii. 9.…

Having an empty space or cavity, natural or artificial, within a solid substance; not solid; excavated in the interior; as, a hollow tree; a hollow sphere. Hollow with boards shalt thou make it. Ex. xxvii. 8..

Insincere; deceitful; not sound and true; having a cavity or decayed spot within.

An effusion of watery liquid into the cavity of a joint.

An accumulation of liquid within the cavity of the cranium, especially within the ventricles of the brain; dropsy of the brain. It is due usually to tubercular meningitis. When it occurs in infancy, it often enlarges the head enormously.