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To cut or divide into two parts.

Division into two parts, esp. two equal parts.

With two partitions or septa. Gray.

In two rows or series.

Having two bristles.

- so called because the ratio of the oxygen of the silica to the oxygen of the base is as two to one. The bisilicates include many of the most common and important minerals.

Having two spines.

A truck for railroad rolling stock, consisting of two ordinary axle boxes sliding in guides attached to a triangular frame; -- called also pony truck.

Having two stipules.

Having two grooves or furrows.

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

Possessing the property of touching at two points. -- n.

Belief in the existence of two gods; dualism.

- Bitter salt, Epsom salts;; magnesium sulphate. -- Bitter vetch (Bot.), a name given to two European leguminous herbs, Vicia Orobus and Ervum Ervilia. -- To the bitter end, to the last extremity, however calamitous.

A frame of two strong timbers fixed perpendicularly in the fore part of a ship, on which to fasten the cables as the ship rides at anchor, or in warping. Other bitts are used for belaying (belaying bitts), for sustaining the windlass (carrick bitts, winch bitts, or windlass bitts), to hold the pawls of the windlass (pa…

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

A mollusk having a shell consisting of two lateral plates or valves joined together by an elastic ligament at the hinge, which is usually strengthened by prominences called teeth. The shell is closed by the contraction of two transverse muscles attached to the inner surface, as in the clam, -- or by one, as in the oyst…

Having two valves, as the oyster and some seed pods; bivalve.

Having two valves.

Having two vaults or arches.