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regarded as a polymeric terpene; also any one of a class of similar substances, as the essential oils of cloves, cubebs, juniper, etc., of which cedrene proper is the type. [Written also cedren.]

and algæ. -- Cellular theory, or Cell theory (Biol.), a theory, according to which the essential element of every tissue, either vegetable or animal, is a cell; the whole series of cells having been formed from the development of the germ cell and by differentiation converted into tissues and organs which, both in pla…

A substance composed essentially of gun cotton and camphor, and when pure resembling ivory in texture and color, but variously colored to imitate coral, tortoise shell, amber, malachite, etc. It is used in the manufacture of jewelry and many small articles, as combs, brushes, collars, and cuffs; -- originaly called xyl…

The substance which constitutes the essential part of the solid framework of plants, of ordinary wood, linen, paper, etc. It is also found to a slight extent in certain animals, as the tunicates. It is a carbohydrate, (C6H10O5)n, isomeric with starch, and is convertible into starches and sugars by the action of heat an…

rly inhabited a great part of Central and Western Europe, and whose descendants at the present day occupy Ireland, Wales, the Highlands of Scotland, and the northern shores of France. [Written also Kelt. The letter C was pronounced hard in Celtic languages.]

The absence or suppression of the essential organs (stamens and pistil) in a flower.

Judicial or ecclesiastical sentence or reprimand; condemnatory judgment. Excommunication or other censure of the church. Bp. Burnet.

A fabulous being, represented as half man and half horse.

Sentinel. [Obs.] Sackville.

or one of the central, bones of the carpus or or tarsus. In the tarsus of man it is represented by the navicular.

mass of an aster from which the rays extend and within which the centrosome lies when present; the attraction sphere. The name has been used both as excluding and including the centrosome, and also to designate a modified mass of protoplasm about a centrosome whether aster rays are developed or not.…

See Sentry. [Obs.] Gray.

ly proper criterion of the point in dispute; as, when the issue is whether a person was absent in the army, this is tried by the certificate of the proper officer in writing, under his seal. Blackstone.

A greenish blue pigment prepared in various ways, consisting essentially of cobalt stannate. Unlike other cobalt blues, it does not change color by gaslight.

A white, waxy substance, forming the essential part of spermaceti.

g in glassy rhombohedral crystals, varying, in color from white to yellow or red. It is essentially a hydrous silicate of alumina and lime. Called also chabasie.

Vexation; irritation of mind; rage. The cardinal in a chafe sent for him to Whitehall. Camden.

The act of a sentry in halting any one who appears at his post, and demanding the countersign.

A signal made for a parley by beat of a drum. They beat the chamade, and sent us carte blanche. Addison.

r velocity in an axis, as in cutting screws, gear, etc. -- To ring the changes on, to present the same facts or arguments in variety of ways.