vin·cu·lum 
(vĭngkyə-ləm)
(vĭngkyə-ləm)n. pl. vin·cu·lums or vin·cu·la (-lə)
1. Mathematics A bar drawn over two or more algebraic terms to indicate that they are to be treated as a single term.
2. Anatomy A bandlike structure, such as a ligament.
3. A bond or tie.
[Latin, bond, tie, from vincīre, to tie.]