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arc noun

  /ɑɹk/ , /ɑːk/
  • (geometry) A continuous part of the circumference of a circle (circular arc) or of another curve. [from 16th c.]
  • (electrics) A flow of current across an insulating medium; especially a hot, luminous discharge between either two electrodes or as lightning. [from 19th c.]
arco
  • A curve, in general. [from 17th c.]
curva, arco

arc- prefix

  • (mathematics, sometimes, proscribed) Alternative form of ar- used to form the names of inverse trigonometric functions, and the symbols for these functions.
arco-
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