Main Entry: ret·i·nac·u·lum

Pronunciation: \ˌre-tə-ˈna-kyə-ləm\

Function: noun

Inflected Form(s): plural ret·i·nac·u·la \-lə\

Etymology: New Latin, from Latin, halter, cable, from retinēre to hold back — more at retain

Date: circa 1825

: any of several fibrous bands of fascia that pass over or under tendons (as at or near the ankle or wrist) and help to keep them in place