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in accordance with the periodic law, and by prediction, to a hypothetical element then unknown, but since discovered and named scandium; -- so called because it was a missing analogue of the boron group. See Scandium.

A genus of venomous snakes found both in America and the Old World. Many species are known. See Coral snake, under Coral.

which has an electrical organ by means of which it can give an electrical shock. The best known kinds are the torpedo, the gymnotus, or electrical eel, and the electric cat. See Torpedo, and Gymnotus. -- Electric fluid, the supposed matter of electricity; lightning. -- Electrical image (Elec.), a collection of electr…

ich two living species, Elephas Indicus and E. Africanus, and several fossil species, are known. They have a proboscis or trunk, and two large ivory tusks proceeding from the extremity of the upper jaw, and curving upwards. The molar teeth are large and have transverse folds. Elephants are the largest land animals now…

To cause to disappear from an equation; as, to eliminate an unknown quantity.

ion; especially, in the operation of deducing from several equations containing several unknown quantities a less number of equations containing a less number of unknown quantities.

men possessing energies may suffer them to lie inactive. The great energies of nature are known to us only by their effects. Paley.

lity of being an enemy; hostile or unfriendly disposition. No ground of enmity between us known. Milton.

sacs, which are formed by diverticula of the alimentary canal. Balanoglossus is the only known genus. See Illustration in Appendix.

The act of enunciating, announcing, proclaiming, or making known; open attestation; declaration; as, the enunciation of an important truth. By way of interpretation and enunciation. Jer. Taylor.

from the coal measures of Nova Scotia; -- so named because supposed to be of the earliest known reptiles.

ies sought, and the number of equations that may be found is greater than the number of unknown quantities. -- Equation of a curve (Math.), an equation which expresses the relation between the coördinates of every point in the curve. -- Equation of equinoxes (Astron.), the difference between the mean and apparent pla…

ven in the daytime, to any star or other object whose right ascension and declination are known. The motion in right ascension is sometimes communicated by clockwork, so as to keep the object constantly in the field of the telescope. Called also an equatorial telescope.

liveried servants, etc., a showy turn-out. The rumbling equipages of fashion . . . were unknown in the settlement of New Amsterdam. W. Irving.

A rose-red mineral, crystallized and earthy, a hydrous arseniate of cobalt, known also as cobalt bloom; -- called also erythrin or erythrine.

ht-colored fishes inhabiting the fresh waters of North America. About seventy species are known. See Darter.

n origin; something not of native growth, as a plant, a word, a custom. Plants that are unknown to Italy, and such as the gardeners call exotics. Addison.

etermined by the experimenter; an act or operation undertaken in order to discover some unknown principle or effect, or to test, establish, or illustrate some suggest or known truth; practical test; poof. A political experiment can not be made in a laboratory, not determinant in a few hours. J. Adams.…

Known by, or derived from, experience; as, experimental religion.

of discovery, especially of geographical discovery; examination; as, the exploration of unknown countries; (Med.)