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Từ điển WordNet v3.1 - WordNet Dictionary
bulb



noun
1. a modified bud consisting of a thickened globular underground stem serving as a reproductive structure (Freq. 2)
Derivationally related forms:
bulbaceous
Hypernyms:
stalk, stem
Hyponyms:
onion, shallot, squill, bulbil, bulblet
2. electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity (Freq. 2)
Syn:
light bulb, lightbulb, incandescent lamp, electric light, electric-light bulb
Hypernyms:
electric lamp
Part Meronyms:
filament
3. a rounded part of a cylindrical instrument (usually at one end) (Freq. 1)
- the bulb of a syringe
Derivationally related forms:
bulbous
Hypernyms:
part, portion
Part Holonyms:
mercury thermometer, mercury-in-glass thermometer, syringe
4. anything with a round shape resembling a teardrop
Derivationally related forms:
bulblike
Hypernyms:
round shape
5. 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
Derivationally related forms:
bulbar, medullary (for: medulla)
Hypernyms:
neural structure
Part Holonyms:
brainstem, brain-stem, brain stem
Part Meronyms:
respiratory center
6. a rounded dilation or expansion in a canal or vessel or organ
Derivationally related forms:
bulbous
Hypernyms:
structure, anatomical structure, complex body part, bodily structure, body structure

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