What does "vinculum" mean?

Vinculum: (Math.) A straight, horizontal mark placed over two or more members of a compound quantity, which are to be subjected to the same operation, as in the expression x2 + y2 - x + y.

Additional senses

  1. 2.(Anat.) A band or bundle of fibers; a frænum.
  2. 3.(Zoöl.) A commissure uniting the two main tendons in the foot of certain birds.

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