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Webster's Dictionary (1865)

Vīn'cu-lum, n.

noun

n.; pl. VIN'CU-LA. [Lat., from vincire, vinctum, to bind; Sp. & Pg. vínculo, It. vincolo.]

  1. A bond of union.
  2. (Math.) A straight, horizontal mark placed over several members of a compound quantity, which are to be subjected to the same operation.