| n. | 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;
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| 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. | |||||||||||||
| 3. | a light bulb. | |||||||||||||
| v. i. | 1. | To take the shape of a bulb; to swell. | ||||||||||||
| Noun | 1. | bulb - a modified bud consisting of a thickened globular underground stem serving as a reproductive structure |
| 2. | bulb - electric lamp consisting of a glass bulb containing a wire filament (usually tungsten) that emits light when heated | |
| 3. | bulb - a rounded part of a cylindrical instrument (usually at one end); "the bulb of a syringe" | |
| 4. | bulb - 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 functioning" Synonyms: medulla oblongata, medulla | |
| 5. | bulb - a rounded dilation or expansion in a canal or vessel or organ |
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