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Từ điển WordNet v3.1 - WordNet 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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