[ flak-sid, flas-id ]
/ ˈflæk sɪd, ˈflæs ɪd /


soft and limp; not firm; flabby: flaccid biceps.
lacking force; weak: flaccid prose.

Nearby words

  1. flabbergasted,
  2. flabby,
  3. flabellate,
  4. flabelli-,
  5. flabellum,
  6. flaccidly,
  7. flack,
  8. flackery,
  9. flacon,
  10. flacons

Origin of flaccid

1610–20; < Latin flaccidus flabby, equivalent to flacc(ēre) to grow weak, languish + -idus -id4

Related formsflac·cid·i·ty, flac·cid·ness, nounflac·cid·ly, adverb

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for flaccid

British Dictionary definitions for flaccid


/ (ˈflæksɪd, ˈflæs-) /


lacking firmness; soft and limp; flabby
Derived Formsflaccidity or flaccidness, nounflaccidly, adverb

Word Origin for flaccid

C17: from Latin flaccidus, from flaccus

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

Word Origin and History for flaccid



1610s, from French flaccide or directly from Latin flaccidus "flabby," from flaccus "flabby, flap-eared," of uncertain origin (OED suggests it's imitative). Related: Flaccidly; flaccidity.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for flaccid


[ flăssĭd, flăkĭd ]


Lacking firmness, resilience, or muscle tone.
Related formsflac•cidi•ty (-sĭdĭ-tē) n.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.