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[flak-sid, flas-id] /ˈflæk sɪd, ˈflæs ɪd/
soft and limp; not firm; flabby:
flaccid biceps.
lacking force; weak:
flaccid prose.
Origin of flaccid
1610-20; < Latin flaccidus flabby, equivalent to flacc(ēre) to grow weak, languish + -idus -id4
Related forms
flaccidity, flaccidness, noun
flaccidly, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for flaccid
Contemporary Examples
Historical Examples
  • He lifted his head and sniffed the flaccid air, which was laden with a heavy odour.

    Alice Adams Booth Tarkington
  • That the Intermediatist is likely to be a flaccid compromiser.

    The Book of the Damned Charles Fort
  • He felt weak and shaky but resentment energized his flaccid muscles.

    The Stars, My Brothers Edmond Hamilton
  • His flaccid mind had never questioned the truth of its dogmas.

    The Rough Road

    William John Locke
  • But how could something happen in a world of flat gold sand and flaccid sea?

    Cully Jack Egan
  • The left lung was light and flaccid, when compared to the right.

  • The muscles were limp and flaccid, not having had time to stiffen.

    Buckskin Mose Buckskin Mose
  • They are gone, and we are left—an unprejudiced, but an invertebrate and a flaccid, generation.

    Seeing and Hearing George W. E. Russell
British Dictionary definitions for flaccid


/ˈflæksɪd; ˈflæs-/
lacking firmness; soft and limp; flabby
Derived Forms
flaccidity, flaccidness, noun
flaccidly, adverb
Word Origin
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
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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
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flaccid in Medicine

flaccid flac·cid (flāk'sĭd, flās'ĭd)
Lacking firmness, resilience, or muscle tone.

flac·cid'i·ty (-sĭd'ĭ-tē) or flac'cid·ness n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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