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s of oscillation, of a pendulum, a right line passing through the center about which it vibrates, and perpendicular to the plane of vibration. -- Axis of polarization, the central line around which the prismatic rings or curves are arranged. Brewster. -- Axis of revolution (Descriptive Geom.), a straight line about w…

Vertebrate.

, as the turtles. (c) The long projecting sucking mouth of some insects, and other invertebrates, as in the Hemiptera. (d) The upper or projecting part of the shell, near the hinge of a bivalve. (e) The prolongation of certain univalve shells containing the canal.

ted. -- Beam center (Mach.), the fulcrum or pin on which the working beam of an engine vibrates. -- Beam compass, an instrument consisting of a rod or beam, having sliding sockets that carry steel or pencil points; -- used for drawing or describing large circles. -- Beam engine, a steam engine having a working beam…

less intensity, so as to produce a pulsating effect; -- said of instruments, tones, or vibrations, not perfectly in unison. A beating wind (Naut.), a wind which necessitates tacking in order to make progress. -- To beat about, to try to find; to search by various means or ways. Addison. -- To beat about the bush, to…

A tremolo effect, such as that produced on the piano by vibratory repetition of a note with sustained use of the pedal.

uch prized as a perfume. Also, the fruit. (b) A variety of mint (Mentha aquatica, var. glabrata).

Of or pertaining to two hundred, esp. to two hundred years; as, a bicentenary celebration. -- n.

The two hundredth year or anniversary, or its celebration.

A market near the Billings gate in London, celebrated for fish and foul language.

A warm-blooded, feathered vertebrate provided with wings. See Aves.

efective, either the body or mind. Sin is a soil which blemisheth the beauty of thy soul. Brathwait.

Of or pertaining to Sir Thomas Bodley, or to the celebrated library at Oxford, founded by him in the sixteenth century.

The hard, calcified tissue of the skeleton of vertebrate animals, consisting very largely of calcic carbonate, calcic phosphate, and gelatine; as, blood and bone.

A covering to protect the arm of the bowman from the vibration of the string; also, a brassart. Chaucer.

of certain starfishes, having a bilateral structure, and swimming by means of bands of vibrating cilia.

onsciousness and volition) which is inclosed in the cartilaginous or bony cranium of vertebrate animals. It is simply the anterior termination of the spinal cord, and is developed from three embryonic vesicles, whose cavities are connected with the central canal of the cord; the cavities of the vesicles become the cent…

The wooden boarding used in supporting the roofs and walls of coal mines. See Brattice.

Celebration of the nuptial feast. [Obs.] "In honor of this bridalty." B. Jonson.

gles to the strings of a violin, guitar, etc., serving of raise them and transmit their vibrations to the body of the instrument.