luminescence

Pronunciation

Noun B1 Intermediate

Light produced by a process other than heat, such as a chemical or biological reaction.

"The jellyfish's faint luminescence was the only light visible in the deep water."

Synonyms and antonyms

glow

Which word fits the gap? "The jellyfish's faint _____ was the only light visible in the deep water."

Answer: luminescence

In your own words, what does "luminescence" mean?

Light produced by a process other than heat, such as a chemical or biological reaction.