سم

سَمُومٌ ذ , of the fem. gender, (S,) A hot wind, (S, M, Msb, K,) or, as some say, a cold wind, (M, [perhaps a mistake occasioned by a misunderstanding of the phrase سَمُومٌ بَارِدٌ, expl. below,]) in the night or in the day, (M,) or generally (K) in the day, (Msb, K,) but authorities differ respecting it, as has been shown voce حَرُورٌ; (Msb;) accord. to AO, it is in the day, and sometimes in the night; and the حَرُور is in the night, and sometimes in the day: (S:) but some say that the former is in the night, and the latter in the day: (Ibn-Es-Seed in the “ Fark, ” TA:) [in the present day it is commonly applied to a violent and intensely-hot wind, generally occurring in the spring or summer, in Egypt and the Egyptian deserts usually proceeding from the south-east or south-south-east, gradually darkening the air to a deep purple hue, whether or not (according to the nature of the tract over which it blows) accompanied by clouds of dust or sand, and at length entirely concealing the sun; but seldom lasting more than about a quarter of an hour or twenty minutes: ] the word is used as a subst. [i. e. alone], and also as an epithet [qualifying the subst. رِيحٌ]: (M:) pl. سَمَائِمٌ. (S, M, K.) One says also سَمُومٌ بَارِدٌ, meaning A سَمُوم that is constant, continual, permanent, settled, or incessant. (S and L in art. برد.) [See also بَارِحٌ.]