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Meaning of BULB

Pronunciation:  bulb

WordNet Dictionary
  1. [n]  a rounded part of a cylindrical instrument (usually at one end); "the bulb of a syringe"
  2. [n]  electric lamp consisting of a glass bulb containing a wire filament (usually tungsten) that emits light when heated
  3. [n]  a rounded dilation or expansion in a canal or vessel or organ
  4. [n]  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"
  5. [n]  a modified bud consisting of a thickened globular underground stem serving as a reproductive structure

BULB is a 4 letter word that starts with B.


 Synonyms: electric light, electric-light bulb, incandescent lamp, light bulb, lightbulb, medulla, medulla oblongata
 See Also: anatomical structure, bodily structure, body structure, bulbil, bulblet, complex body part, electric lamp, filament, hindbrain, mercury thermometer, mercury-in-glass thermometer, neural structure, onion, part, portion, respiratory center, rhombencephalon, shallot, squill, stalk, stem, structure, syringe



Webster's 1913 Dictionary
  1. \Bulb\ (b[u^]lb), n. [L. bulbus, Gr. bolbo`s: cf. F.
    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
    {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.
  2. \Bulb\, v. i.
    To take the shape of a bulb; to swell.
Medical Dictionary
 Definition: Modified plant bulb with scaly leaves that grows beneath the soil.
Dream Dictionary
 Definition: Dreaming of a plant bulb, represents your spiritual, physical, and intellectual potential. It refers to the growth of some project, relationship, or situation. Alternatively, it symbolizes your genetic heritage, family tradition or fertility.
Biology Dictionary
 Definition: A modified underground stem which has one or more buds enclosed in fleshy modified leaves or scales which supply energy to the bud(s) when they start to grow; onions and tulips have bulbs.
Thesaurus Terms
 Related Terms: 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