فعو ر فعى

أَفْعًى ذ , (S, Msb, K) of the fem. gender, but with tenween, (S, Msb,) because it is a subst., not an epithet; (Msb;) [said in the S and Msb to be like أَرْوًى; but this is a mistake, for اروى is without tenween;] or it is an epithet and a subst.; (K, TA;) but mostly a subst.; (TA;) [if used as an epithet, it is without tenween, written أَفْعَى, being also of the measure of a verb;] A certain serpent, (S, Msb, K,) of a malignant kind; [i. e. the viper; ] also called ↓ أُفْعُوٌّ, (K, TA, [in the CK, erroneously, اُفْعُوان, which see in what follows,]) occurring in a trad., in which it is said that there is no harm in the killing of the أُفْعُوّ and the حُدُوّ by the مُحْرِم, the [final] alif being changed into و in both of these words in the dial. of El-Hijáz: (TA:) it is spotted, black and white; slender in the neck; broad in the head; it is said that it will not quit its place; (TA;) always coiling itself round; and neither antidote nor charm is of any avail against it: (Msb, TA:) sometimes it has two horns [i. e. it sometimes signifies the cerastes, or horned viper ]: (TA:) ↓ أُفْفُوَانٌ signifies the male: (S, Msb, TA:) [see also خِشَاشٌ:] the pl. is أَفَاعٍ. (S, Msb, K. * [In the K, the pl. is written أَفَاعِى, which, when indeterminate, is wrong.]) ― -b2- [Hence,] by way of comparison [to vipers], (TA,) الأَفَاعِى signifies (tropical:) Certain veins (عُرُوق) that branch off from the حَالِبَانِ [q. v.]. (K.)