Bog, s. A marsh, a fen, a morass.

Bole, s. The body or trunk of a tree.

Bole Armenia, s. Little used but as an application to ulcers, where the discharge is thin and acrimonious.

Bolt, s. An arrow; a dart; a thunderbolt. Bolt upright, that is, upright as an arrow; the bar of a door; an iron to fasten the legs.

Bolt, v. To spring out with speed and suddenness. To gib, or diverge from the course.

Bolus, s. A medicine made up into a soft mass larger than pills.

Bone, s. The solid parts of the body of an animal.

The bones of birds are nearly all hollow, and communicating with the lungs, are thence filled with air, so as to render them more buoyant for flight. The breast bone (sternum) extends much lower than in quadrupeds, and is distinguished by a ridge like the keel of a ship, except in the ostrich, &c., which do not fly. The bones of the wings are similar to the fore-legs of quadrupeds.—Rennie.

Boom, v. To rush with violence. To make a noise like a bittern.

Boonk (Ardea minuta, Linn.), s.