Bulb
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]


The Collaborative International Dictionary of English. 2000.

Synonyms:
(like those of the onion and the tulip) /


Look at other dictionaries:

  • bulb — bulb …   Dictionnaire des rimes

  • bulb — BULB, bulbi, s.m. 1. Tulpină (subterană) a unor plante, alcătuită din frunze în formă de tunici sau solzi suprapuşi (în care se depun substanţe de rezervă), cu un înveliş membranos uscat. 2. (În sintagmele) Bulb pilos = partea terminală, umflată …   Dicționar Român

  • bulb — [bulb] n. [ME < L bulbus < Gr bolbos] 1. an underground bud that sends down roots and consists of a very short stem covered with leafy scales or layers, as in a lily, onion or hyacinth 2. a corm, tuber, or tuberous root resembling a bulb,… …   English World dictionary

  • bulb — [bʌlb] n ↑filament, ↑thread [Date: 1500 1600; : Latin; Origin: bulbus, from Greek bolbos plant with a bulb ] 1.) the glass part of an electric light, that the light shines from = ↑light bulb ▪ a 100 watt bulb …   Dictionary of contemporary English

  • bulb — (n.) 1560s, an onion, from M.Fr. bulbe, from L. bulbus bulb, onion, from Gk. bolbos plant with round swelling on underground stem. Expanded by 1800 to swelling in a glass tube (thermometer bulb, light bulb, etc.) …   Etymology dictionary

  • bulb — bulb; bulb·less; bulb·let; pseu·do·bulb; …   English syllables

  • Bulb — Bulb, v. i. To take the shape of a bulb; to swell. [1913 Webster] …   The Collaborative International Dictionary of English

  • bulb — [ bʌlb ] noun count * 1. ) the part of a plant that is shaped like an onion from which a flower grows. You plant bulbs in the ground: daffodil bulbs 2. ) a LIGHT BULB …   Usage of the words and phrases in modern English

  • bulb — ► NOUN 1) a rounded underground storage organ present in some plants, consisting of a short stem surrounded by fleshy leaf bases. 2) a light bulb. 3) an expanded or rounded part at the end of something. ORIGIN Greek bolbos onion, bulbous root …   English terms dictionary

  • bulb — Mot Monosíl·lab Nom masculí …   Diccionari Català-Català

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