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liquid or for measuring the quantity of liquid or gas received or discharged. It consists essentially of a graduated glass tube, usually furnished with a small aperture and stopcock.

The essential principle of cacao; -- now called theobromine.

tance; chief; principal. A capital article in religion Atterbury. Whatever is capital and essential in Christianity. I. Taylor.

An explosive consisting essentially of nitroglycerin, wood meal, and some nitrate, as that of sodium.

The complex radical, CO.OH, regarded as the essential and characteristic constituent which all oxygen acids of carbon (as formic, acetic, benzoic acids, etc.) have in common; -- called also oxatyl.

The essential coloring principle of cochineal, extracted as a purple-red amorphous mass. It is a glucoside and possesses acid properties; -- hence called also carminic acid. Carmine red (Chem.), a coloring matter obtained from carmine as a purple-red substance, and probably allied to the phthaleïns.…

nd 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 p…

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…

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

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.

ing 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.

A massive mineral, greenish in color, and opal-like in appearance. It is essentially a hydrous silicate of iron.

A bitter, yellow substance forming the essential constituent of Goa powder, and yielding chrysophanic acid proper; hence formerly called also chrysphanic acid.

l of cinnamon, a colorless aromatic oil obtained from cinnamon and cassia, and consisting essentially of cinnamic aldehyde, C6H5.C2H2.CHO. -- Wild cinnamon. See Canella.

Incidental; relating to, but not essential. We must therefore distinguish between the essentials in religious worship . . . and what is merely circumstantial. Sharp.

In respect to circumstances; not essentially; accidentally. Of the fancy and intellect, the powers are only circumstantially different. Glanvill.

f cobalt. -- Cobalt glance. (Min.) See Cobaltite. -- Cobalt green, a pigment consisting essentially of the oxides of cobalt and zinc; -- called also Rinman's green. -- Cobalt yellow (Chem.), a yellow crystalline powder, regarded as a double nitrite of cobalt and potassium.