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The bottom of the sea, esp. of the deep oceans; hence (Bot. & Zoöl.), the fauna and flora of the sea bottom; -- opposed to plankton.

Benzene nucleus, Benzene ring (Chem.), a closed chain or ring, consisting of six carbon atoms, each with one hydrogen atom attached, regarded as the type from which the aromatic compounds are derived. This ring formula is provisionally accepted as representing the probable constitution of the benzene molecule, C6H6, a…

A narrow shelf or path between the bottom of a parapet and the ditch.

In the composition of chemical names bi- denotes two atoms, parts, or equivalents of that constituent to the name of which it is prefixed, to one of the other component, or that such constituent is present in double the ordinary proportion; as, bichromate, bisulphide. Be- and di- are often used interchangeably.…

Having two hydrogen atoms which can be replaced by negative atoms or radicals to form salts; -- said of bases. See Diacid.

Having to hydrogen atoms which can be replaced by positive or basic atoms or radicals to form salts; -- said of acids. See Dibasic.

One who hides away books, as in a tomb. [R.] Crabb.

Containing two atoms or equivalents of carbon in the molecule. [Obs. or R.]

A compound consisting of two atoms of chlorine with one or more atoms of another element; -- called also dichloride. Bichloride of mercury, mercuric chloride; -- sometimes called corrosive sublimate.

A compound of two atoms of hydrogen with some other substance. [Obs.]

That part of a ship's hull or bottom which is broadest and most nearly flat, and on which she would rest if aground.

a bilious patient; dependent on, or characterized by, an excess of bile; as, bilious symptoms.

s dissolved. Jer. iii. 8. -- Bill of entry, a written account of goods entered at the customhouse, whether imported or intended for exportation. -- Bill of exceptions. See under Exception. -- Bill of exchange (Com.), a written order or request from one person or house to another, desiring the latter to pay to some p…

A flat-bottomed river barge or coasting vessel. [Eng.]

To prevent or restrain from customary or natural action; as, certain drugs bind the bowels.

nal faces so as to form a cube; -- called also optical cube. It is used in one form of photometer.

is found in a native state, and as a constituent of some minerals. Specific gravity 9.8. Atomic weight 207.5. Symbol Bi.

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

Equivalent in combining or displacing power to two atoms of hydrogen; dyad.

ting of dark-colored matter; or the substance so discharged; -- one of the most fatal symptoms in yellow fever.