noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Any of several single-valued or multivalued functions that are inverses of the cosine function.
2. 2
   the inverse function of the cosine; the angle that has a cosine equal to a given number wordnet

Synonyms

All synonyms

arccosinverse cosineinverse cosineanticosinearc cosinearccos

Etymology

From arc- + cosine.

Related phrases

single valued

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