AskDefine | Define bulb

Dictionary Definition



1 a modified bud consisting of a thickened globular underground stem serving as a reproductive structure
2 electric lamp consisting of 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 functioning" [syn: medulla oblongata, medulla]
5 a rounded dilation or expansion in a canal or vessel or organ

User Contributed Dictionary




  1. Any solid object rounded at one end and tapering on the other, possibly attached to a larger object at the tapered end
  2. A light bulb
  3. The bulb-shaped root portion of a plant such as a tulip, from which the rest of the plant may be regrown.
    • 2005, Plato, Sophist. Translation by Lesley Brown. 265c.
      the plants which grow in the earth from seed or bulbs.


rounded solid object
  • Portuguese: bulbo
light bulb see light bulb
bulb-shaped root

Extensive Definition


bulb in Bulgarian: Луковица
bulb in Catalan: Bulb
bulb in Czech: Cibule (orgán)
bulb in German: Zwiebel (Pflanzenteil)
bulb in Modern Greek (1453-): Βολβός
bulb in Spanish: Bulbo (botánica)
bulb in Esperanto: Bulbo
bulb in French: Bulbe
bulb in Italian: Bulbo
bulb in Hebrew: בצל
bulb in Hungarian: Hagyma (szerv)
bulb in Malay (macrolanguage): Bebawang
bulb in Dutch: Bol (biologie)
bulb in Japanese: 球根
bulb in Polish: Cebula (botanika)
bulb in Russian: Луковица
bulb in Simple English: Bulb
bulb in Slovak: Cibuľa (stonka)
bulb in Chinese: 鳞茎

Synonyms, Antonyms and Related Words

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