Arc Definition

ärk
arced, arcing, arcs
noun
arcs
Something shaped like a curve or arch.
The vivid arc of a rainbow.
American Heritage
The part of a circle that is the apparent path of a heavenly body above and below the horizon.
Webster's New World
A bowlike curved line or object.
Webster's New World
An electric arc.
American Heritage
The band of sparks or incandescent light formed when an electric discharge is conducted from one electrode or conducting surface to another, characterized by relatively high current and low potential difference between electrodes.
Webster's New World
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verb
arced, arcing, arcs
To move in a curved course.
Webster's New World
To move or seem to move in a curved path.
The stars that arc across the sky.
American Heritage
To form an arc.
Webster's New World
To arc is defined as to make a curved shape or move in a curved path.
An example of arc is the way stars move across the sky.
YourDictionary
(intransitive) To move following a curved path.
Wiktionary
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abbreviation
American Red Cross.
Webster's New World
AIDS-related complex.
American Heritage Medicine
American Red Cross.
American Heritage Medicine
adjective
Designating an inverse trigonometric function.
Arc sine x is an angle whose sine is x.
Webster's New World
anagram
Wiktionary
Wiktionary
Wiktionary
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prefix

(mathematics) Used to form the names of inverse trigonometric and hyperbolic functions, and also the symbols for these functions.

Arc-sine (British), arcsine (US)
Arctan.
Wiktionary
other
A segment of a circle.
American Heritage Science

Other Word Forms of Arc

Noun

Singular:
arc
Plural:
arcs

Origin of Arc

  • From Middle English, from Old French arc, from Latin arcus (“a bow, arc, arch”).

    From Wiktionary

  • Middle English ark from Old French arc from Latin arcus

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Latin arcus ("bow")

    From Wiktionary

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