bul

v. i. To take the shape of a bulb; to swell. [ 1913 Webster ]

n. [ L. bulbus, Gr. bolbo`s: cf. F. bulbe. ] 1. (Bot.) A spheroidal body growing from a plant either above or below the ground (usually below), which is strictly a bud, consisting of a cluster of partially developed leaves, and producing, as it grows, a stem above, and roots below, as in the onion, tulip, etc. It differs from a corm in not being solid. [ 1913 Webster ]

2. (Anat.) A name given to some parts that resemble in shape certain bulbous roots; as, the bulb of the aorta. [ 1913 Webster ]

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 nervous papilla contained in the cavity of the tooth. [ 1913 Webster ]

3. An expansion or protuberance on a stem or tube, as the bulb of a thermometer, which may be of any form, as spherical, cylindrical, curved, etc. Tomlinson. [ 1913 Webster ]

3. a light bulb. [ 1913 Webster ]

a. [ L. bulbaceus. See Bulb, n. ] Bulbous. Jonson. [ 1913 Webster ]

a. Of or pertaining to bulb; especially, in medicine, pertaining to the bulb of the spinal cord, or medulla oblongata; as, bulbar paralysis. [ 1913 Webster ]

a. Having a bulb; round-headed. [ 1913 Webster ]

n. [ Dim., fr. bulb, n. ] (Bot.) A separable bulb formed on some flowering plants. [ 1913 Webster ]

a. [ Bulb, n.+ -ferous: cf. F. bulbifère. ] (Bot.) Producing bulbs. [ 1913 Webster ]

n. [ Dim. fr. bulb. ] 1. (Bot.) A small or secondary bulb; hence, now almost exclusively: An aërial bulb or deciduous bud, produced in the leaf axils, as in the tiger lily, or relpacing the flowers, as in some onions, and capable, when separated, of propagating the plant; -- called also bulblet and brood bud. [ Webster 1913 Suppl. ]

2. (Anat.) A small hollow bulb, such as an enlargement in a small vessel or tube. [ Webster 1913 Suppl. ]