Definition of vinculum

• n. - A bond of union; a tie.
• n. - 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.
• n. - A band or bundle of fibers; a fraenum.
• n. - A commissure uniting the two main tendons in the foot of certain birds.