prefix ·Rare ·Advanced level

Definitions

Prefix

1. 1
   Used to form the names of inverse trigonometric functions, and the symbols for these functions. morpheme

   "arc-sine (British), arcsine (US)"

2. 2
   Alternative form of ar- used to form the names of inverse hyperbolic functions, and the symbols for these functions. alt-of, alternative, morpheme, proscribed, sometimes

Synonyms

All synonyms

1a

Example

More examples

"arc-sine (British), arcsine (US)"

Etymology

From Latin arcus (“bow, arc”), as they represent an angle or arc. Compare etymology of arch.

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