Definitions of bulb [ʌlb]

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Definition of 'bulb'

Random House Webster's College Dictionary

1. (n.) bulb
a swollen, usu. underground stem having fleshy scalelike leaves that contain stored food, as in the onion or daffodil.

2.  bulb
a plant growing from such a stem.

3.  bulb
any round, enlarged part, esp. at the end of a cylindrical object:
the bulb of a thermometer.

4.  bulb
the glass housing, in which a partial vacuum has been established, that contains the filament of an incandescent lamp.

5.  bulb
an incandescent lamp.

6.  bulb
any of various small, bulb-shaped anatomical structures or protuberances:
olfactory bulb.

7.  bulb
a camera shutter setting in which the shutter remains open as long as the shutter release is depressed.

Etymology: (1560–70; < L bulbus < Gk bolbós onion)

Definition of 'bulb'

Princeton's WordNet

1. (noun) bulb
a modified bud consisting of a thickened globular underground stem serving as a reproductive structure

2. (noun) light bulb, lightbulb, bulb, incandescent lamp, electric light, electric-light bulb
electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity

3. (noun) bulb
a rounded part of a cylindrical instrument (usually at one end)
"the bulb of a syringe"

4. (noun) bulb
anything with a round shape resembling a teardrop

5. (noun) medulla oblongata, medulla, 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"

6. (noun) bulb
a rounded dilation or expansion in a canal or vessel or organ

Definition of 'bulb'

Kernerman English Learner’s Dictionary

1. (noun) bulb
a glass object in an electric light
I need to change the bulb.; The bulb burned out.

2. bulb
an underground part of some plants from which they grow each year
***tulip bulbs

Definition of 'bulb'

Webster Dictionary

1. (noun) bulb
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. (noun) bulb
a name given to some parts that resemble in shape certain bulbous roots; as, the bulb of the aorta

3. (noun) bulb
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

4. (verb) bulb
to take the shape of a bulb; to swell

Translation of 'bulb'

Kernerman English Multilingual Dictionary

Sense: the ball-shaped part of the stem of certain plants, eg onions, tulips etc, from which their roots grow.
Afrikaans: bol	Arabic: بَصَلَه	Bulgarian: луковица
Brazilian: bulbo	Czech: cibule, cibulka	German: die Zwiebel
Danish: løg	Greek: βολβός	Spanish: bulbo
Estonian: sibul	Farsi: پیاز	Finnish: sipuli
French: bulbe	Hebrew: פְּקַעַת	Hindi: बल्ब
Croatian: lukovica	Hungarian: gumó	Indonesian: umbi
Italian: bulbo, tubero	Japanese: 球根	Korean: 알뿌리
Lithuanian: svogūnėlis	Latvian: (tulpes u.tml.) sīpols	Malay: bebawang
Dutch: bol, bloembol	Norwegian: (blomster)løk, knoll	Polish: cebulka
Persian: پیاز	Pashto: غوټه	Portuguese: bolbo
Romanian: bulb	Russian: луковица	Slovak: cibuľa
Slovenian: čebulica	Serbian: lukovica	Swedish: [blom]lök
Thai: หัว (ของต้นไม้)	Turkish: çiçek soğanı	Taiwanese: 球莖
Ukrainian: цибулина	Urdu: گانٹھ ، گنٹھی ، پیاز ہا ل	Vietnamese: củ, thân (hành, tỏi)
Chinese: 球茎
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