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Water confined in specially constructed compartments in a vessel's hold, to serve as ballast.

A whirling blast or wind. A whirl-blast from behind the hill. Wordsworth.

A magnifying glass consisting of two plano-convex lenses. It is designed to correct spherical aberration and chromatic dispersion.

A silicate of lime of a white to gray, red, or yellow color, occurring generally in cleavable masses, rarely in tabular crystals; tabular spar.

The posterior, or fourth, lateral plate in the plastron of turtles; -- called also xiphisternum.

Formed of wood pulp by molds; relating to casts made of wood pulp in molds.

into a freehold, To abate in lands (Law), to enter into a freehold after the death of the last possessor, and before the heir takes possession. See Abatement, 4.

The entry of a stranger, without right, into a freehold after the death of the last possessor, before the heir or devisee. Blackstone. Defense in abatement, Plea in abatement, (Law), plea to the effect that from some formal defect (e.g. misnomer, want of jurisdiction) the proceedings should be abated.…

s a nuisance. (b) A person who, without right, enters into a freehold on the death of the last possessor, before the heir or devisee. Blackstone.

Continuing; lasting.

ow formation, unattended with the pain and heat characteristic of ordinary abscesses, and lasting for years without exhibiting any tendency towards healing; a chronic abscess.

The process of generation by development of blastema, or fission of cells, in which the new formation is in all respect like the individual from which it proceeds.

A system of elastic springs for relieving the strain upon a rope, as in deep-sea dredging.

A composition, usually in verse, in which the first or the last letters of the lines, or certain other letters, taken in order, form a name, word, phrase, or motto.

ation which terminates in the reunion of divided parts without suppuration. -- Adhesive plaster, a sticking; a plaster containing resin, wax, litharge, and olive oil.

other is joined to another receiver. It is used in distillations, to give more space to elastic vapors, to increase the length of the neck of a retort, or to unite two vessels whose openings have different diameters. [Written also adapter.]

Eternal; everlasting. "Æonian hills." Tennyson.

Having the form or nature of air, or of an elastic fluid; gaseous. Hence fig.: Unreal.

The science of measuring the air, including the doctrine of its pressure, elasticity, rarefaction, and condensation; pneumatics.

diaphragm so arranged that its action opens and closes valves, producing synchronous air blasts sufficient to operate a larger diaphragm with greater amplitude of vibration.