Meaning of SPECTRUM in English

SPECTRUM

( n. )

The several colored and other rays of which light is composed, separated by the refraction of a prism or other means, and observed or studied either as spread out on a screen, by direct vision, by photography, or otherwise. See Illust. of Light, and Spectroscope.

Webster's Revised Unabridged English Dictionary.      Пересмотренный полный словарь английского языка Webster.