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[ret-n-ak-yuh-luh m] /ˌrɛt nˈæk yə ləm/
noun, plural retinacula
[ret-n-ak-yuh-luh] /ˌrɛt nˈæk yə lə/ (Show IPA)
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.
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 Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for retinaculum


noun (pl) -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 Forms
retinacular, adjective
Word Origin
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
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retinaculum in Medicine

retinaculum ret·i·nac·u·lum (rět'n-āk'yə-ləm)
n. pl. ret·i·nac·u·la (-lə)
A band or bandlike structure that holds an organ or a part in place.

ret'i·nac'u·lar (-lər) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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