noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   a theoretical body, approximated by a hole in a hollow black sphere, that absorbs all incident electromagnetic radiation and reflects none; it has a characteristic emission spectrum
2. 2
   a hypothetical object capable of absorbing all the electromagnetic radiation falling on it wordnet

Synonyms

All synonyms

black bodyblack bodyfull radiator

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