[ret-n-ak-yuh-luh m]

noun, plural ret·i·nac·u·la [ret-n-ak-yuh-luh] /ˌrɛt nˈæk yə lə/.

Anatomy, Zoology. any of various small structures that hook, clasp, or bind other structures to move them or hold them in place.
Entomology. a bristle on the butterfly forewing that clasps to the frenulum of the hindwing.

Nearby words

  1. retiform,
  2. retiform tissue,
  3. retin-,
  4. retin-a,
  5. retina,
  6. retinaculum of fibular muscles,
  7. retinaculum of flexor muscles,
  8. retinaculum of peroneal muscles,
  9. retinaculum of skin,
  10. retinaculum tendinum

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. 2019

Examples from the Web for retinaculum

British Dictionary definitions for retinaculum


noun plural -la (-lə)

connection or retention or something that connects or retains
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

Medicine definitions for retinaculum



n. pl. ret•i•nac•u•la (-lə)

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.