LUMINANCE


Meaning of LUMINANCE in English

[ 'lu:mɪn(ə)ns ]

■ noun

1》 Physics the intensity of light emitted from a surface per unit area in a given direction.

2》 the component of a television signal which carries information on the brightness of the image.

Origin

C19: from L. luminant- luminare 'illuminate' + -ance .

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.