illuminance

Fetched 2026-10-26 (cache).

Synonyms: illuminate, luminance, illuminant, illuminants, illuminable, illuminances, bioluminance

Antonyms: illuminate, luminance, illuminant, illuminants, illuminable, illuminances, bioluminance

Related words from Datamuse; suggestions, not definitions.

Noun

1. {{lb|en|physics}} The [[luminous flux]] incident on unit area of a surface; commonly measured in [[lux]] ([[lumen]]/[[metre]]²) or otherwise [[foot-candle]]s. The illuminance of a star upon the earth is frequently measured on a negative logarithmic scale referred to as its [[apparent magnitude]], which see.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.