Speakur

Word Pronunciation & Dictionary

illuminance

Word Rarity Very rare

Frequency: Zipf frequency 1.65 in modern English

Syllables
il-lu-mi-nance
IPA
15
Scrabble Score
11
Letters
4
Syllables
8
Unique Chars

Meaning

noun

The luminous flux incident on unit area of a surface; commonly measured in lux (lumen/metre²) or otherwise foot-candles. The illuminance of a star upon the earth is frequently measured on a negative logarithmic scale referred to as its apparent magnitude, which see.

Countable; Uncountable

Usage

Inflected Forms

illuminances (plural)

Synonyms

illumination

Questions

What does illuminance mean?
The luminous flux incident on unit area of a surface; commonly measured in lux (lumen/metre²) or otherwise foot-candles. The illuminance of a star upon the earth is frequently measured on a negative logarithmic scale referred to as its apparent magnitude, which see.

How to pronounce illuminance

  1. Open the pronunciation page — Open the Speakur entry for “illuminance”.
  2. Read the phonetic spelling — Read the IPA spelling () so you know which sounds to aim for.
  3. Play the audio — Click Play to hear reference audio for “illuminance”.
  4. Repeat and practice — Say “illuminance” aloud, matching stress and vowels until it feels natural.