The Great Plains, the Midwest, the Mississippi Valley and the southern United States are all areas that are vulnerable to tornadoes. They are relatively rare west of the Rockies and are also less frequent in the northeastern states. Tornado Alley is a colloquial term for an area particularly prone to tornadoes.
GCIDE(0.00 / 0 votes)Rate this definition: 1  Limpid(a.) Clear and unambiguous; lucid; easy to understand; -- of speech and writing; as, limpid prose. 2  Limpid(a.) Calm, untroubled, and without worry; serene.
pemphigoid, cicatricial. A rare, idiopathic, chronic systemic disease, most commonly of the elderly and characterized by recurrent blisters and bullae of the skin and mucous membranes, with subsequent scarring and shrinkage. The disease may affect only the conjunctiva (ocular pemphigoid).tymology: L, cicatrix, scar; Gk, pemphix, blister or bubble + eidos, form. a benign, chronic, usually bilateral, subepidermal blistering disease chiefly involving the mucous membranes, especially those of the mouth and eye.