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The act of lengthening in space or in time; extension; protraction. Bacon.

moeba. Amoeboid movement, movement produced, as in the amoeba, by successive processes of prolongation and retraction.

tera. (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.

A slender prolongation of the receptacle as an axis between the carpels, as in Geranium and many umbelliferous plants.

state of continuing; the state of being continued; uninterrupted extension or succession; prolongation; propagation. Preventing the continuation of the royal line. Macaulay.

An abnormal prolongation of the axis of inflorescence.

on each side, are prolonged and covered with weblike skin, forming a sort of wing. These prolongations aid them in making long leaps from tree to tree. Called also flying lizard.

erior angle (Geom.), the angle included between any side of a triangle or polygon and the prolongation of the adjacent side; also, an angle included between a line crossing two parallel lines and either of the latter on the outside. -- Exterior side (Fort.), the side of the polygon upon which a front of fortification…

Prolongation.

The anterior prolongation of the guard of the phragmocone of belemnites and allied fossil cephalopods, whether horny or calcareous. See Illust. of Phragmocone.

The act of counting in duration; prolongation. [Obs.] South.

A drawing out, or continuing; the act of delaying the termination of a thing; prolongation; continuance; delay; as, the protraction of a debate. A protraction only of what is worst in life. Mallock.

A prolongation or increase of any sound, eithar by reflection, as in a cavern or apartment the walls of which are not distant enough to return a distinct echo, or by the production of vibrations in other bodies, as a sounding-board, or the bodies of musical instruments. Pulmonary resonance (Med.), the sound heard on pe…

(Bot.), one of the slender, hairlike fibers found on the surface of fresh roots. They are prolongations of the superficial cells of the root into minute tubes. Gray. -- Root leaf (Bot.), a radical leaf. See Radical, a., 3 (b). -- Root louse (Zoöl.), any plant louse, or aphid, which lives on the roots of plants, as th…

Any beaklike prolongation, esp. of the head of an animal, as the beak of birds.

nted for its oil. It sometimes attains a length of thirty feet, and is remarkable for the prolongation of the nose of the adult male into an erectile elastic proboscis, about a foot in length. Another species of smaller size (M. angustirostris) occurs on the coast of Lower California, but is now nearly extinct.…

The anterior prolongation of the margin of any gastropod shell for the protection of the soft siphon.

The anterior prolongation of the head of a gastropod; -- called also rostrum.

bill (Bot.), any plant of the genus Pelargonium; -- so called in allusion to the beaklike prolongation of the axis of the receptacle of its flower. See Pelargonium.

The prolongation of one or more tones of a chord into the chord which follows, thus producing a momentary discord, suspending the concord which the ear expects. Cf. Retardation. Pleas in suspension (Law), pleas which temporarily abate or suspend a suit. -- Points of suspension (Mech.), the points, as in the axis or be…