flac·cid \ˈflaksə̇d, ÷ˈflasə̇d, ÷ˈflaasə̇d\adjective Etymology: Latin flaccidus, from flaccus flabby 1. a.: yielding to pressure for want of firmness and stiffness : flabby < a flaccid muscle > b.of a plant cell or tissue: deficient in turgor 2.: weak and ineffective : lacking vigor or force < flaccid leadership > < flaccid opinions drably expressed > • flac·cid·lyadverb