laser
laser 英 [ˈleɪzə(r)] 美 [ˈlezɚ]
n. 激光
名词复数:lasers
- A laser is a focused beam of light used for many reasons, from eye surgery to gun scopes to laser pointers.
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- n. 激光
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1. a laser beam
激光束
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2. a laser navigation device
激光导航装置
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3. She's had laser surgery on her eye.
她做了眼部激光手术。
- laser (n.) 1960, acronym for "light amplification by stimulated emission of radiation," on pattern of maser (1955). A corresponding verb, lase, was coined by 1962. Related: Lasered; lasering. Laser disc recorded from 1980. Earlier laser was the name of a type of gum-resin from North Africa used medicinally (1570s), from Latin; still earlier it was an Old English and Middle English name for some weed, probably cockle.
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