英语词汇“bulb”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	bulb
释义	bulb —bulbed, adj. —bulbless, adj. /bulb/, n. 1. Bot. a. a usually subterranean and often globular bud having fleshy leaves emergent at the top and a stem reduced to a flat disk, rooting from the underside, as in the onion and lily. b. a plant growing from such a bud. 2. any round, enlarged part, esp. at the end of a cylindrical object: the bulb of a thermometer. 3. Elect. a. the glass housing, in which a partial vacuum has been established, that contains the filament of an incandescent electric lamp. b. an incandescent or fluorescent electric lamp. 4. Anat. any of various small, bulb-shaped structures or protuberances: olfactory bulb; bulb of urethra. 5. See medulla oblongata. 6. Building Trades. a rounded thickening at the toe of an angle iron or tee. 7. Naut. a cylindrical or spherical prominence at the forefoot of certain vessels. 8. Photog. a shutter setting in which the shutter remains open as long as the shutter release is depressed. Symbol: B [1560-70; < L bulbus < Gk bolbós onion, bulbous plant]
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