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bulb 音標拼音: [b'ʌlb] n. 燈泡;球狀物 燈泡;球狀物 bulb燈泡 bulb燈泡 bulb n 1: a modified bud consisting of a thickened globular underground stem serving as a reproductive structure 2: electric lamp consisting of a transparent or translucent glass housing containing a wire filament ( usually tungsten) that emits light when heated by electricity [ synonym: { light bulb}, { lightbulb}, { bulb}, { 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: anything with a round shape resembling a teardrop 5: 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" [ synonym: { medulla oblongata}, { medulla}, { bulb}] 6: a rounded dilation or expansion in a canal or vessel or organBulb \ Bulb\, v. i. To take the shape of a bulb; to swell. [ 1913 Webster]
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. [ 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] 96 Moby Thesaurus words for " bulb": ball, balloon, bilge, bladder, blain, bleb, blister, blob, boll, bolus, boss, bow, bubble, bulbil, bulblet, bulge, bulla, bump, bunch, burl, button, cahot, chine, clump, condyle, convex, corm, dowel, ear, ellipsoid, flange, flap, gall, geoid, globe, globelet, globoid, globule, glomerulus, gnarl, gob, gobbet, handle, hill, hump, hunch, jog, joggle, knob, knot, knur, knurl, lip, loop, lump, mole, mountain, nevus, nub, nubbin, nubble, oblate spheroid, orb, orbit, orblet, papilloma, peg, pellet, prolate spheroid, radicle, radix, rhizome, rib, ridge, ring, rondure, root, rootstock, shoulder, sphere, spheroid, spherule, spine, stud, style, tab, tap, taproot, tuber, tubercle, tubercule, verruca, vesicle, wale, wart, welt
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