Meaning of LASER in English



Pronunciation: ' l ā -z ə r

Function: noun

Usage: often attrib

Etymology: l ight a mplification by s timulated e mission of r adiation

Date: 1957

1 : a device that utilizes the natural oscillations of atoms or molecules between energy levels for generating a beam of coherent electromagnetic radiation usually in the ultraviolet, visible, or infrared regions of the spectrum

2 : something resembling a laser beam in accuracy, speed, or intensity <threw a laser into the end zone> <a laser stare>

Merriam Webster Collegiate English Dictionary.      Merriam Webster - Энциклопедический словарь английского языка.