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more about bulb
bulb |
3 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Bulb \Bulb\, v. i. To take the shape of a bulb; to swell. From Webster's Revised Unabridged Dictionary (1913) [web1913]: Bulb \Bulb\ (b[u^]lb), 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. 2. (Anat.) 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 nervous papilla contained in the cavity of the tooth. 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. From WordNet r 1.6 [wn]: bulb n 1: a modified bud consisting of a thickened globular underground stem serving as a reproductive structure 2: a glass bulb containing a wire filament (usually tungsten) that emits light when heated [syn: {light bulb}, {lightbulb}, {incandescent lamp}, {electric light}, {electric-light bulb}] 3: a rounded part of a cylindrical instrument (usually at one end); "the bulb of a syringe" 4: lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata); "the medulla oblongata is the most vital part of the brain because it contains centers controlling breathing and heart funtioning" [syn: {medulla oblongata}, {medulla}] 5: a rounded dilation or expansion in a canal or vessel or organ
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