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An alkaloidal ureide, C7H8N4O2, homologous with and resembling caffeine, produced artificially, and also extracted from cacao and chocolate (from Theobroma Cacao) as a bitter white crystalline substance; -- called also dimethyl xanthine.

Luminescence exhibited by a substance on being moderately heated. It is shown esp. by certain substances that have been exposed to the action of light or to the cathode rays. ---lu`mi*nes"cent (#), a.

An amine containing three amido groups.

A tertiary amine analogous to trimethylamine.

A colorless volatile alkaline liquid, N.(CH3)3, obtained from herring brine, beet roots, etc., with a characteristic herringlike odor. It is regarded as a substituted ammonia containing three methyl groups.

or the part of, especially for the purpose of causing to fall or be overthrown; to form a mine under; to sap; as, to undermine a wall. A vast rock undermined from one end to the other, and a highway running through it. Addison.

One who undermines.

Of or pertaining to twigs; made of pliant twigs. "In the hive's vimineous dome." Prior.

Expectancy; condition of being undetermined.

the plural, faculty, talent. Then the disciples, every man according to his ability, determined to send relief unto the brethren. Acts xi. 29. Natural abilities are like natural plants, that need pruning by study. Bacon. The public men of England, with much of a peculiar kind of ability. Macaulay.

s & Peck. -- Absolute temperature (Physics), the temperature as measured on a scale determined by certain general thermo-dynamic principles, and reckoned from the absolute zero. -- Absolute zero (Physics), the be ginning, or zero point, in the scale of absolute temperature. It is equivalent to -273º centigrade or -45…

To bring out distinctly; to make prominent; to emphasize. In Bosnia, the struggle between East and West was even more accentuated. London Times.

s, the acceptance of a gift, office, doctrine, etc. They shall come up with acceptance on mine altar. Isa. lx. 7.

e will . . . accredit his praises. Cowper. These reasons . . . which accredit and fortify mine opinion. Shelton.

by an accession of parts externally; an extraneous addition; as, an accretion of earth. A mineral . . . augments not by grown, but by accretion. Owen. To strip off all the subordinate parts of his as a later accretion. Sir G. C. Lewis.

mpound principle, whose presence is necessary to produce acidity, as oxygen, chlorine, bromine, iodine, etc.

Slightly sour; sub-acid; sourish; as, an acidulous tincture. E. Burke. Acidulous mineral waters, such as contain carbonic anhydride.

The projection formed by the thyroid cartilage in the neck. It is particularly prominent in males, and is so called from a notion that it was caused by the forbidden fruit (an apple) sticking in the throat of our first parent. -- Adam's flannel (Bot.), the mullein (Verbascum thapsus). -- Adam's needle (Bot.), the pop…

dness; a name given to the diamond and other substance of extreme hardness; but in modern minerology it has no technical signification. It is now a rhetorical or poetical name for the embodiment of impenetrable hardness. Opposed the rocky orb Of tenfold adamant, his ample shield. Milton.

A provisional name for a plant which has not had its flowers botanically examined, and therefore has not been referred to its proper genus.