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The hypothetical radical C3H7, regarded as the essential residue of propane and related compounds.

A syllogism preliminary or logically essential to another syllogism; the conclusion of such a syllogism, which becomes a premise of the following syllogism.

An instrument for measuring the tension of the aqueous vapor in the atmosphere, being essentially a wet and dry bulb hygrometer.

tc., organized or chartered to follow a public calling or to render services more or less essential to the general public convenience or safety.

inding and mixing clay, either for brickmaking or the fine arts; a clay mill. It consists essentially of an upright shaft armed with projecting knives, which is caused to revolve in a hollow cylinder, tub, or vat, in which the clay is placed.

hydraulic machine, variously constructed, for raising or transferring fluids, consisting essentially of a moving piece or piston working in a hollow cylinder or other cavity, with valves properly placed for admitting or retaining the fluid as it is drawn or driven through them by the action of the piston.…

Quincey. The English language, however, . . . had even already become too thoroughly and essentially a mixed tongue for his doctrine of purism to be admitted to the letter. Craik.

A substance resembling, and isomeric with, ordinary camphor, and extracted from the essential oil of feverfew; -- called also Pyrethrum camphor.

A hypothetical radical, C5H4N, regarded as the essential residue of pyridine, and analogous to phenyl.

ning to, or designating, the acid liquid obtained in the distillation of wood, consisting essentially of impure acetic acid.

ey are all silicates of lime and magnesia with sometimes alumina and iron. Pyroxene is an essential constituent of many rocks, especially basic igneous rocks, as basalt, gabbro, etc.

A rock consisting essentially of pyroxene.

Queen's metal (Metal.), an alloy somewhat resembling pewter or britannia, and consisting essentially of tin with a slight admixture of antimony, bismuth, and lead or copper. -- Queen's pigeon. (Zoöl.) Same as Queen pigeon, above. -- Queen's ware, glazed English earthenware of a cream color. -- Queen's yellow (Old C…

Hence: An extract from anything, containing its rarest virtue, or most subtle and essential constituent in a small quantity; pure or concentrated essence. Let there be light, said God; and forthwith light Ethereal, first of things, quintessence pure, Sprung from the deep. Milton.

A characteristic, essential, and fundamental constituent of any compound; hence, sometimes, an atom. As a general rule, the metallic atoms are basic radicals, while the nonmetallic atoms are acid radicals. J. P. Cooke.

Radicalness; relation to root in essential to a root in essential nature or principle.

Without derivation; primitively; essentially. [R.] These great orbs thus radically bright. Prior.

An apparatus for the production of sound by the action of luminous or thermal rays. It is essentially the same as the photophone.

ables and simple food may also be had; -- sometimes loosely used, in English, of what are essentially basement restaurants where liquors are served.

without one's host, to ignore in a calculation or arrangement the person whose assent is essential; hence, to reckon erroneously.