Relaxed or lacking in sti?ness. Used to describe muscles that are not contracting (or following DENERVATION), and organs – for example, the penis – that are lying loose, empty, or with wrinkles. (Opposite: ?rm or erect.)
adj. 1. flabby and lacking in firmness. 2. characterized by a decrease in or absence of muscle tone. In flaccid paralysis there is absence of muscle tone in one or both limbs, and tendon reflexes are absent. It is a sign of damage to lower *motor neurons. Compare spastic paralysis. —flaccidity n.