arccos

A1R1C3C3O1S1

A form of arccosine — Any of several single-valued or multivalued functions that are inverses of the cosine function.

Similar
arc cosinearccosineinverse cosine
OriginEnglish cos ← Latin arcus ← Proto-Italic *arkuos →
UncommonScrabble 10
Ask AI about this wordChatGPTClaudePerplexityGoogle AIGrok

Meanings

nounarccos (plural arccoses)

plural arccoses

  1. abbreviationAbbreviation of arccosine.

    arccos (1/2ϕ)=2π/5

    1 more example

    […]with the appropriate constraint angles measured in terms of the arccoses and arctans.

    1973, The Soviet Economy in Regional Perspective, Praeger Publishers, page 3

Synonyms & antonyms

nounthe inverse function of the cosine; the angle that has a cosine equal to a given number

Similar
arc cosinearccosineinverse cosine
Broader
trigonometric functioncircular function
Also see
arccosineinverse cosine

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Proto-Indo-European*h₂erkʷ-
  2. Proto-Indo-European*h₂erkʷos
  3. Proto-Italic*arkuos
  4. Latinarcus
  5. Englisharc-
  6. Englishcosmetologyclip.
  7. Englishcos
  8. Englisharccos

From arc- + cos.

Full word history & related roots →

Rhymes & wordplay

Anagrams

corsac
Cite this entry
APA

arccos. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/arccos

MLA

“arccos.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/arccos. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “arccos,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/arccos.

Source: arccos on Wiktionary, CC BY-SA 4.0.