[ret-n-ak-yuh-luh m]
noun, plural ret·i·nac·u·la [ret-n-ak-yuh-luh] /ˌrɛt nˈæk yə lə/.
  1. Anatomy, Zoology. any of various small structures that hook, clasp, or bind other structures to move them or hold them in place.
  2. Entomology. a bristle on the butterfly forewing that clasps to the frenulum of the hindwing.

Origin of retinaculum

1815–25; < New Latin; Latin retināculum tether, rope which holds fast or restrains, equivalent to retin(ēre) to hold fast, retain + -ā- (from v. stems ending in -ā-; cf. gubernaculum) + -culum -cule2 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for retinaculum

Historical Examples of retinaculum

British Dictionary definitions for retinaculum


noun plural -la (-lə)
  1. connection or retention or something that connects or retains
  2. zoology a small hook that joins the forewing and hind wing of a moth during flight
Derived Formsretinacular, adjective

Word Origin for retinaculum

C18 (a surgical instrument used in castration): Latin, from rētinēre to hold back
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

retinaculum in Medicine


n. pl. ret•i•nac•u•la (-lə)
  1. A band or bandlike structure that holds an organ or a part in place.
Related formsret′i•nacu•lar (-lər) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.