Search the Dictionary

A sulphide having two atoms of sulphur in the molecule; a disulphide, as in iron pyrites, FeS2; -- less frequently called bisulphuret.

Any Friday on which a public disaster has occurred, as: In England, December 6, 1745, when the news of the landing of the Pretender reached London, or May 11, 1866, when a financial panic commenced. In the United States, September 24, 1869, and September 18, 1873, on which financial panics began.

A small, clear space in the segments of the ovum, the precursor of the nucleus.

One of the Blastoidea.

One of the divisions of Crinoidea found fossil in paleozoic rocks; pentremites. They are so named on account of their budlike form.

Of, pertaining to, or resembling, the blennies.

The time between daylight and candle light. [Humorous]

A kind of meteor; a bolis.

Like or pertaining to the genus Bombyx, or the family Bombycidæ.

eit; real or really; actual or actually; genuine or genuinely; as, you must proceed bona fide; a bona fide purchaser or transaction.

Good faith; honesty; freedom from fraud or deception.

A female slave, or one bound to service without wages, as distinguished from a hired servant.

A binary compound of boron with a more positive or basic element or radical; -- formerly called boruret.

A double fluoride of boron and hydrogen, or some other positive element, or radical; -- called also fluoboride, and formerly fluoborate.

A compound of boric acid and glycerin, used as an antiseptic.

e a cluster of grapes, as a mineral presenting an aggregation of small spherical or spheroidal prominences.

Relating to that tribe of ruminant mammals of which the genus Bos is the type.

One of the Brachioganoidei.

An order of ganoid fishes of which the bichir of Africa is a living example. See Crossopterygii.

A plane of an orthorhombic crystal which is parallel both to the vertical axis and to the shorter lateral (brachydiagonal) axis.