فسق

الفُوَيْسِقَةُ ذ The rat, or mouse; syn. الفَأْرَةُ: (S, O, K:) so called because it comes forth from its hole upon people: (O, K:) or, accord. to Z, because it does mischief in houses: and it is said in a trad. that it is to be killed: the word is the dim. of فَاسِقَةٌ. (TA.)