laser/'leɪzər $ -zər/

n. a device that produces a very strong beam of controlled light or the beam of light itself

n. [C] 激光器；激光：Lasers are used in eye surgery. 激光用于眼睛手术。

◇a laser beam 激光束

◇laser surgery 激光手术

◇a laser printer 激光打印机

构词是light amplification by stimulated emission of radiation的缩略词