noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A branch of physics that deals with light or the study of light and its effects. uncountable
2. 2
   That science concerned with the production of light and energy, especially regarding therapeutic applications. uncountable

Synonyms

All synonyms

opticsphotometry

Etymology

From photo- + -logy.

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