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Từ điển Oxford Learners Wordfinder Dictionary
bulb
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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