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The region surrounding the anus, particularly of echinoderms.

The region surrounding a moving body, such as the wing of a bird or a gliding aëroplane, within which cyclic or vortical motion of the air occur.

The membrane surrounding the mouth of an invertebrate animal.

re, etc.; specifically, a complete system of columns, whether on all sides of a court, or surrounding a building, such as the cella of a temple. Used in the former sense, it gives name to the larger and inner court of a Roman dwelling, the peristyle. See Colonnade.

An organ in certain fungi and lichens, surrounding and enveloping the masses of fructification. Henslow.

y 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.]

Surrounding the tracheæ.

That part of the integument of an insect which surrounds the spiracles.

Surrounding the uterus.

Surrounding the vertebræ.

ics or domestic affairs. [Colloq.] -- Petticoat pipe (Locomotives), a short, flaring pipe surrounding the blast nozzle in the smoke box, to equalize the draft.

To put or set in a particular rank, office, or position; to surround with particular circumstances or relations in life; to appoint to certain station or condition of life; as, in whatever sphere one is placed. Place such over them to be rulers. Ex. xviii. 21.

The dwarf wall surrounding the arena of an amphitheater, from the top of which the seats began.

The open sea supposed to surround the north pole. Kane.

oan, a game at cards played on a round board with compartments. -- Pope's eye, the gland surrounded with fat in the middle of the thigh of an ox or sheep. R. D. Blackmore. -- Pope's nose, the rump, or uropygium, of a bird. See Uropygium.

ndividuals are round and disk-shaped, with a large zooid in the center of the under side, surrounded by smaller nutritive and reproductive zooids, and by slender dactylozooids near the margin. The disk contains a central float, or pneumatocyst.

the French portail, used by recent writers for the whole architectural composition which surrounds and includes the doorways and porches of a church.

The investing portion, or spherical envelope, surrounding the eccentric germinal spot of the germinal vesicle.

That which is protuberant swelled or pushed beyond the surrounding or adjacent surface; a swelling or tumor on the body; a prominence; a bunch or knob; an elevation. Solar protuberances (Astron.), certain rose-colored masses on the limb of the sun which are seen to extend beyond the edge of the moon at the time of a so…

Prominent, or excessively prominent; bulging beyond the surrounding or adjacent surface; swelling; as, a protuberant joint; a protuberant eye. -- Pro*tu"ber*ant*ly, adv.