bulb
(bŭlb)n.
1. Botany
a. A short, modified, underground stem surrounded by usually fleshy modified leaves that contain stored food for the shoot within: an onion bulb; a tulip bulb.
b. A similar underground stem or root, such as a corm, rhizome, or tuber.
c. A plant that grows from a bulb.
2. A rounded projection or part: the bulb of a syringe.
3. A light bulb.
4. Anatomy A rounded dilation or expansion of a canal, vessel, or organ.
[Latin bulbus, from Greek bolbos, bulbous plant.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
bulb
(bʌlb)n
1. (Botany) a rounded organ of vegetative reproduction in plants such as the tulip and onion: a flattened stem bearing a central shoot surrounded by fleshy nutritive inner leaves and thin brown outer leaves. Compare corm
2. (Botany) a plant, such as a hyacinth or daffodil, that grows from a bulb
3. (Electrical Engineering) See light bulb
4. (General Engineering) a rounded part of an instrument such as a syringe or thermometer
5. (Anatomy) anatomy a rounded expansion of a cylindrical organ or part, such as the medulla oblongata
6. (Nautical Terms) Also called: bulbous bow a bulbous protuberance at the forefoot of a ship to reduce turbulence
[C16: from Latin bulbus, from Greek bolbos onion]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
bulb
(bʌlb)n.
1.
a. a swollen, usu. underground stem having fleshy scalelike leaves that contain stored food, as in the onion or daffodil.
b. a plant growing from such a stem.
2. any round, enlarged part, esp. at the end of a cylindrical object: the bulb of a thermometer.
3.
a. the glass housing, in which a partial vacuum has been established, that contains the filament of an incandescent lamp.
b. an incandescent lamp.
4. any of various small, bulb-shaped anatomical structures or protuberances: olfactory bulb.
6. a camera shutter setting in which the shutter remains open as long as the shutter release is depressed.
[1560–70; < Latin bulbus < Greek bolbós onion]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
bulb
(bŭlb)1. A round part of a stem that develops underground and contains the shoot of a new plant. A bulb is surrounded by leaf-like scales that provide nourishment to the new plant. Tulips, lilies, and onions grow from bulbs. Compare corm, rhizome, runner, tuber.
2. The part of an incandescent or fluorescent lamp that gives off light. The bulb of an incandescent lamp contains a filament inside a usually rounded piece of glass. The bulb of a fluorescent lamp is a glass tube or chamber containing a mixture of gases without a filament.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
| Noun | 1. | bulb - a modified bud consisting of a thickened globular underground stem serving as a reproductive structure onion - the bulb of an onion plant shallot - aggregate bulb of the multiplier onion squill - bulb of the sea squill, which is sliced, dried, and used as an expectorant |
| 2. |  bulb - electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricityelectric lamp - a lamp powered by electricity filament - a thin wire (usually tungsten) that is heated white hot by the passage of an electric current | |
| 3. | bulb - a rounded part of a cylindrical instrument (usually at one end); "the bulb of a syringe" mercury thermometer, mercury-in-glass thermometer - thermometer consisting of mercury contained in a bulb at the bottom of a graduated sealed glass capillary tube marked in degrees Celsius or Fahrenheit; mercury expands with a rise in temperature causing a thin thread of mercury to rise in the tube part, portion - something less than the whole of a human artifact; "the rear part of the house"; "glue the two parts together" syringe - a medical instrument used to inject or withdraw fluids | |
| 4. | bulb - anything with a round shape resembling a teardrop round shape - a shape that is curved and without sharp angles | |
| 5. |  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"neural structure - a structure that is part of the nervous system brain stem, brainstem, brain-stem - the part of the brain continuous with the spinal cord and comprising the medulla oblongata and pons and midbrain and parts of the hypothalamus respiratory center - the center in the medulla oblongata and pons that integrates sensory information about the level of oxygen and carbon dioxide in the blood and determines the signals to be sent to the respiratory muscles | |
| 6. | bulb - a rounded dilation or expansion in a canal or vessel or organ anatomical structure, bodily structure, body structure, complex body part, structure - a particular complex anatomical part of a living thing; "he has good bone structure" |
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
bulb
Collins Thesaurus of the English Language – Complete and Unabridged 2nd Edition. 2002 © HarperCollins Publishers 1995, 2002
Translations
بَصَلَة النَباتبَصَلَهبُصَيْلَةُ المِصْباحِ الكَهْرَبائيبُصَيْلَةُ ميزانِ الحَرارَهلـَمْبَة كَهْرَبائِيّ
cibulkažárovkahlízabaňkabulva
elektrisk pærekugleløgblomsterløg
hehkulamppukasvisipuli
lukovicažarulja
üveggömbvillanykörtevirághagyma
kúlalaukurljósapera
球根電球
구근전구
lemputėsvogūnėlissvogūninissvogūno pavidalotermometro galiukas
elektriskā spuldzesīpolsspuldzetermometra bumbiņa
čebulicažarnica
lökglödlampa
หลอดไฟฟ้าหัวของต้นไม้
ampulbaloncukçiçek soğanıelektrik ampulühazne
bóng đèncủ
bulb
[bʌlb] NCollins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
Collins English/French Electronic Resource. © HarperCollins Publishers 2005
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
bulb
(balb) noun1. the ball-shaped part of the stem of certain plants, eg onions, tulips etc, from which their roots grow.
2. (also ˈlight bulb) a pear-shaped glass globe surrounding the element of an electric light.
3. the pear-shaped end of a thermometer.
ˈbulbous adjective like a bulb, especially in shape. a bulbous nose.
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.
bulb
→ بَصَلَة النَبات, لـَمْبَة كَهْرَبائِيّ cibulka, žárovka blomsterløg, elektrisk pære Blumenzwiebel, Glühbirne βόλβος, λαμπτήρας bombilla, bulbo hehkulamppu, kasvisipuli ampoule, bulbe lukovica, žarulja bulbo, lampadina 球根, 電球 구근, 전구 bloembol, lichtpeertje (blomster)løk, lyspære cebulka, żarówka bolbo, bulbo, lâmpada луковица, электрическая лампочка glödlampa, lök หลอดไฟฟ้า, หัวของต้นไม้ ampul, soğan bóng đèn, củ 灯泡, 球茎Multilingual Translator © HarperCollins Publishers 2009
bulb
n. bulbo, pera; bombillo;
1. [syringe] pera de goma;
2. expansión oval o circular de un conducto o cilindro.
English-Spanish Medical Dictionary © Farlex 2012