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The fringe of teeth around the orifice of the capsule of mosses. It consists of 4, 8, 16, 32, or 64 teeth, and may be either single or double.

Turning around; rotatory; revolving; as, a peristrephic painting (of a panorama).

A division of ciliated Infusoria having a circle of cilia around the oral disk and sometimes another around the body. It includes the vorticellas. See Vorticella.

Around the blood vessels; as, perivascular lymphatics.

Around the viscera; as, the perivisceral cavity.

Situated around the vitellus, or between the vitellus and zona pellucida of an ovum.

Situated around the radii, or radial tubes, of a radiate.

A remarkable genus of marine worms having tentacles around the mouth. It is usually classed with the gephyreans. Its larva (Actinotrocha) undergoes a peculiar metamorphosis.

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.

; to fill with piles; to strengthen with piles. To sheet-pile, to make sheet piling in or around. See Sheet piling, under 2nd Piling.

The center of the volta, ring, or manege ground, around which a horse turns. From pillar to post, hither and thither; to and fro; from one place or predicament to another; backward and forward. [Colloq.] -- Pillar saint. See Stylite. -- Pillars of the fauces. See Fauces, 1.

the thrust of an arch, etc. Some renowned metropolis With glistering spires and pinnacles around. Milton.

The officer or soldier who simply turns in his place whike the company or line moves around him in wheeling; -- called also pivot man. Pivot bridge, a form of drawbridge in which one span, called the pivot span, turns about a central vertical axis. -- Pivot gun, a gun mounted on a pivot or revolving carriage, so as to…

ach.) See Epicyclic train, under Epicyclic. -- Planet wheel, a gear wheel which revolves around the wheel with which it meshes, in an epicyclic train.

rument for measuring the area of any plane figure, however irregular, by passing a tracer around the bounding line; a platometer.

orula by the divergence of its cells in such a manner as to give rise to a central space, around which the cells arrange themselves as an envelope; an embryonic form intermediate between the morula and gastrula. Sometimes used as synonymous with gastrula.

of a point, so as to follow and enlarge a hole previously made, or to form a counterbore around it. -- Plug rod (Steam Eng.) , a rod attached to the beam for working the valves, as in the Cornish engine. -- Plug valve (Mech.), a tapering valve, which turns in a case like the plug of a faucet.

s its eggs in crescent-shaped incisions made with its jaws. The larva lives upon the pulp around the stone. Called also turk, and plum curculio. See Illust. under Curculio.

athe, or a substitute for a lathe, in which the work is turned by means of a cord passing around it, one end being fastened to the treadle, and the other to an elastic pole above. -- Pole mast (Naut.), a mast formed from a single piece or from a single tree. -- Pole of a lens (Opt.), the point where the principal axi…