01 n. A spheroidal body growing from a plant either above or below the ground (usually below), which is strictly a bud, consisting of a cluster o…
-
1.
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.(Bot.)
-
2.
A name given to some parts that resemble in shape certain bulbous roots; as, the bulb of the aorta.(Anat.)
-
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.
-
4.
a light bulb. See: light bulb
Phrases & compounds
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.