luminescence

IPA/ˌluːmɪˈnesns/
KK[lˌumənˈɛsəns]IPA/ˌluːmɪˈnesns/

luminescence — noun

1. light produced by a material or living thing without becoming hot enough to glow

1.nounC2
Definition

light produced by a material or living thing without becoming hot enough to glow from heat.

Example

The lab measured the blue luminescence from the treated mineral sample.

luminescence from [material/process]

Divers watched the jellyfish's luminescence brighten the water around them.

Common collocations
  • chemical luminescence
  • green luminescence
  • luminescence from a mineral
  • the luminescence of jellyfish
Synonyms
  • fluorescence

    a specific kind of luminescence caused by absorbing energy and giving it off quickly

  • phosphorescence

    a kind of luminescence that continues after the energy source is removed

  • bioluminescence

    luminescence produced by living organisms

Antonyms

Grammar Patterns

luminescence in/from [substance/process]

the luminescence of [organism/material]

Usage Note

Usually used in science or nature contexts when the focus is on how light is produced without strong heat. Distinguish it from sense 2, which describes the gentle visual effect rather than the physical process.

Common Mistakes

The campfire's luminescence lit the beach.
The campfire's glow lit the beach.
'luminescence' is used for light not caused by high heat or flames.

2. a gentle, spread-out light that gives something a soft glowing appearance.

2.nounC2
Definition

a gentle, spread-out light that gives something a soft glowing appearance.

Example

The paper lanterns filled the courtyard with a warm golden luminescence.

a warm [adjective] luminescence

Ada paused by the window, admiring the moonlit luminescence on fresh snow.

Common collocations
  • warm luminescence
  • soft luminescence
  • golden luminescence
  • pale luminescence
Synonyms
  • glow

    broader and much more common for a soft visible light

  • radiance

    more elevated and often suggests richer or brighter beauty

  • sheen

    usually a light shine on a surface rather than light filling a space

Antonyms
  • glare

    harsh, uncomfortable brightness

Grammar Patterns

a soft/warm luminescence

luminescence in/of [place/object]

Usage Note

More common in descriptive or literary writing than in technical discussion. This sense names the visible glow itself, not the scientific reason the light appears.

Common Mistakes

The stadium's harsh luminescence hurt my eyes.
The stadium's glare hurt my eyes.
this sense suggests gentle, soft light rather than strong, uncomfortable brightness.

Word family

Synonym discussion

Sense: noun/1

These words all involve light that is not produced by strong heat, but they work at different levels of meaning. 'Luminescence' is the broad umbrella term for this kind of light, so it fits scientific writing when you do not want to name the exact mechanism first. 'Fluorescence' is more specific: it appears while a material is absorbing energy, often under ultraviolet light, and usually stops quickly when the energy source is removed. 'Phosphorescence' continues glowing after the source is gone. 'Bioluminescence' is the variety made by living things such as jellyfish or fireflies. So a report might first mention 'luminescence in the sample' and later identify whether it is fluorescence or phosphorescence.

luminescence ↗fluorescence ↗phosphorescencebioluminescence ↗

Common collocations

Nouns

Phrases

  • a soft luminescence
  • the luminescence of

Prepositions

Etymology

LatinEnglish

The word comes from Latin 'lumen', meaning 'light'. English formed 'luminescence' in scientific use to describe light that appears without the strong heat linked to burning or red-hot objects. From that technical sense, writers also extended it to describe a soft glowing quality in scenes, surfaces, and colours.