ret·i·nac·u·lum 
(rĕt′n-ăkyə-ləm)
(rĕt′n-ăkyə-ləm)n. pl. ret·i·nac·u·la (-lə)
Biology
Biology
A band or bandlike structure that holds an organ or a part in place.
[Latin retināculum, band, tether : retinēre, to restrain; see RETAIN + -culum, suff. denoting instruments.]
ret′i·nacu·lar (-lər) adj.