What does "apostilb" mean?

a unit of luminance, being the luminance of a perfectly diffusing surface emitting light at the rate of ¹⁄_π candela per square metre. Also known as a blondel.

Apostilb

noun

noun ·Rare ·Advanced level

Definitions

Noun

1
a unit of luminance, being the luminance of a perfectly diffusing surface emitting light at the rate of ¹⁄_π candela per square metre. Also known as a blondel.

Related phrases

square metre

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.