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ertically elongated parenchyma cells, such as are seen beneath the epidermis of the upper surface of many leaves. -- Palisade worm (Zoöl.), a nematoid worm (Strongylus armatus), parasitic in the blood vessels of the horse, in which it produces aneurisms, often fatal.

s, the pallial line, or impression, which marks the attachment of the mantle on the inner surface of a bivalve shell. See Illust. of Bivalve. Pallial chamber (Zoöl.), the cavity inclosed by the mantle. -- Pallial sinus (Zoöl.), an inward bending of the pallial line, near the posterior end of certain bivalve shells, to…

An annelid (Palola viridis) which, at certain seasons of the year, swarms at the surface of the sea about some of the Pcific Islands, where it is collected for food.

e the last quarter of the moon in October and November, they swarm in vast numbers at the surface of the sea for breeding, and are gathered and highly esteemed as food by the natives. An allied species inhabits the tropical Atlantic and swarms in June or July.

A minute soft filamentary process springing from the surface of certain hydroids and sponges.

A division; a distinct piece, limited part, or compartment of any surface; a patch; hence, a square of a checkered or plaided pattern.

Having flat sides or surfaces; as, a sixpaned nut.

A kind of curve; one of the conic sections formed by the intersection of the surface of a cone with a plane parallel to one of its sides. It is a curve, any point of which is equally distant from a fixed point, called the focus, and a fixed straight line, called the directrix. See Focus.

ve is a parabola. See Conoid. -- Parabolic mirror (Opt.), a mirror having a paraboloidal surface which gives for parallel rays (as those from very distant objects) images free from aberration. It is used in reflecting telescopes. -- Parabolic spindle, the solid generated by revolving the portion of a parabola cut off…

The solid generated by the rotation of a parabola about its axis; any surface of the second order whose sections by planes parallel to a given line are parabolas.

ence in position of a body (as the sun, or a star) as seen from some point on the earth's surface, and as seen from some other conventional point, as the earth's center or the sun. Annual parallax, the greatest value of the heliocentric parallax, or the greatest annual apparent change of place of a body as seen from th…

One of the imaginary circles on the surface of the earth, parallel to the equator, marking the latitude; also, the corresponding line on a globe or map.

A substance resembling starch, found in the green frothy scum formed on the surface of stagnant water.

To burn the surface of; to scorch; to roast over the fire, as dry grain; as, to parch the skin; to parch corn. Ye shall eat neither bread, nor parched corn. Lev. xxiii. 14.

In modern architecture, the plastering of the inside of flues, intended to give a smooth surface and help the draught.

The act of cutting off the surface or extremites of anything.

A surface or line of separation where a division occurs.

Having a surface dressed by cutting with a hammer the head of which consists of broad thin chisels clamped together.

or cover with stone, brick, or other material, so as to make a firm, level, or convenient surface for horses, carriages, or persons on foot, to travel on; to floor with brick, stone, or other solid material; as, to pave a street; to pave a court. With silver paved, and all divine with gold. Dryden. To pave thy realm, a…

is paved; a floor or covering of solid material, laid so as to make a hard and convenient surface for travel; a paved road or sidewalk; a decorative interior floor of tiles or colored bricks. The riches of heaven's pavement, trodden gold. Milton. Pavement teeth (Zoöl.), flattened teeth which in certain fishes, as the s…