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The principal walk or approach to a house which is withdrawn from the road, especially, such approach bordered on each side by trees; any broad passageway thus bordered. An avenue of tall elms and branching chestnuts. W. Black.

In the English corn trade, the medial price of the several kinds of grain in the principal corn markets. On an average, taking the mean of unequal numbers or quantities.

e (Geom.), a straight line which bisects a system of parallel chords of a curve; called a principal axis, when cutting them at right angles, in which case it divides the curve into two symmetrical portions, as in the parabola, which has one such axis, the ellipse, which has two, or the circle, which has an infinite num…

A raft or float, used principally on the Pacific coast of South America.

A sum equal to the interest at a given rate on the principal (face) of a bill or note from the time of discounting until it becomes due.

An Italian marble of which the principal varieties occur in the neighborhood of Carrara and in Corsica. It commonly shows a dark gray or bluish ground traversed by veins.

A part of the tiling which projects beyond the principal rafters, in buildings where there is a gable. Gwilt.

The principal component part of a thing.

A principal compartment of the walls, roof, or other part of a building, or of the whole building, as marked off by the buttresses, vaulting, mullions of a window, etc.; one of the main divisions of any structure, as the part of a bridge between two piers.

One of the principal horizontal timbers of a building or ship. The beams of a vessel are strong pieces of timber stretching across from side to side to support the decks. Totten.

A cement used in making joints, filling cracks, etc. For iron, the principal constituents are iron borings and sal ammoniac; for wood, white lead or litharge, whiting, and linseed oil.

That which is connected with a principal or greater thing; an appendage; an appurtenance.

The inner or principal room in a hut or house of two rooms; -- opposed to but, the outer apartment. [Scot.]

Most; largest; as, the best part of a week. Best man, the only or principal groomsman at a wedding ceremony.

Having two principal ribs running longitudinally, as a leaf.

Anything that binds, as a fillet, cord, rope, or band; a bandage; -- esp. the principal piece of timber intended to bind together any building.

The principal rafters of a roof. Weale.

A suffix or terminal formative, used principally in biological terms, and signifying growth, formation; as, bioblast, epiblast, mesoblast, etc.

The fluid which circulates in the principal vascular system of animals, carrying nourishment to all parts of the body, and bringing away waste products to be excreted. See under Arterial.

t, of a person or animal, as distinguished from the limbs and head; the main, central, or principal part, as of a tree, army, country, etc. Who set the body and the limbs Of this great sport together Shak. The van of the king's army was led by the general; . . . in the body was the king and the prince. Clarendon. River…