Thesaurus: bulb

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1. 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 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. n. A name given to some parts that resemble in shape certain bulbous roots; as, the bulb of the aorta.
3. n. 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. v. i. To take the shape of a bulb; to swell.
5. n. a modified bud consisting of a thickened globular underground stem serving as a reproductive structure
6. n. electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity
7. n. a rounded part of a cylindrical instrument (usually at one end)
8. n. anything with a round shape resembling a teardrop
9. n. lower or hindmost part of the brain; continuous with spinal cord; (‘bulb’ is an old term for medulla oblongata)
10. n. a rounded dilation or expansion in a canal or vessel or organ
11. 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. To take the shape of a bulb; to swell.
12. A spheroidal body growing from a plant either above or belowthe ground (usually below), which is strictly a bud, consisting of acluster of partially developed leaves, and producing, as it grows, astem above, and roots below, as in the onion, tulip, etc. It differsfrom a corm in not being solid.