Longman Dictionary of Contemporary English homepage

Topic: MATHS

Date: 1300-1400
Language: Old French
Origin: Latin arcus 'bow, arch, arc'

arc

noun
     
arc [countable]
1CF a curved shape or line:
the arc of a rainbow
2 part of a curved line or a circle:
The sun moves across the sky in an arc.
3TEE a flash of light formed by the flow of electricity between two points
arc verb [transitive]
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