apostilb

English

Noun

apostilb (plural apostilbs)

1. (physics) a unit of luminance, being the luminance of a perfectly diffusing surface emitting light at the rate of ${\displaystyle \pi ^{-1}}$ candela per square metre. Also known as a blondel.

Portuguese

Noun

apostilb m (plural apostilb or apostilbs)

1. (physics) apostilb (unit of luminance)