Source : Webster's Revised Unabridged Dictionary (1913)

Flaccid \Flac"cid\, a. [L. flaccidus, fr. flaccus flabby: cf.
   OF. flaccide.]
   Yielding to pressure for want of firmness and stiffness; soft
   and weak; limber; lax; drooping; flabby; as, a flaccid
   muscle; flaccid flesh.

         Religious profession . . . has become flacced. --I.
                                                  Taylor.
   -- {Flac"cid*ly}, adv. -- {Flac"cid*ness}, n.