BRACHYSTOCHRONE n.
A curve, in which a body, starting from a given point, and descending solely by the force of gravity, will reach another given point in a shorter time than it could by any other path. This curve of quickest descent, as it is sometimes called, is, in a vacuum, the same as the cycloid.
BRANCH n.
A warrant or commission given to a pilot, authorizing him to pilot vessels in certain waters. Branches of a bridle, two pieces of bent iron, which bear the bit, the cross chains, and the curb. -- Branch herring. See Alewife. -- Root and branch , totally, wholly.
BULB n.
A name given to some parts that resemble in shape certain bulbous roots; as, the bulb of the aorta. Bulb of the eye, the eyeball. -- Bulb of a hair, the "root," or part whence the hair originates. -- Bulb of the spinal cord, the medulla oblongata, often called simply bulb. -- Bulb of a tooth, the vascular and nervou…
BUTTER n.
atures, as butter of cacao, vegetable butter, shea butter. Butter and eggs (Bot.), a name given to several plants having flowers of two shades of yellow, as Narcissus incomparabilis, and in the United States to the toadflax (Linaria vulgaris). -- Butter boat, a small vessel for holding melted butter at table. -- Butt…