laser | meaning of laser in Longman Dictionary of Contemporary English | LDOCE

From Longman Dictionary of Contemporary EnglishRelated topics: Technology, Visual, Physics, Medicine, Industrylaserla‧ser /ˈleɪzə $ -ər/ ●●○ noun [countable]    1 Ta piece of equipment that produces a powerful narrow beam of light that can be used in medical operations, to cut metals, or to make patterns of light for entertainment  laser surgery2 a beam of light produced by a laserOrigin laser (1900-2000) From "light amplification by stimulated emission of radiation"