حيض

مَحِيضٌ محيض is a simple subst. as well as an inf. n.: (Zj, K:) as the former, it is a n. of place; and as such it is [said to be] used in the Kur ii. 222; meaning A woman's مَأْتًى; (Zj;) her فَرْج; (Mgh;) because it is the place of الحَيْض. (Zj, Mgh.) Some say that حَوْضٌ is hence derived; because the water flows to the حوض: (Az, K:) for the Arabs put و in the place of ى, and ى in that of و. (Az, TA.) ― -b2- It is also a n. of time [signifying The time of menstruating ]. (TA.) ― -b3- See also حِيضَةٌ. ― -b4- When it is a simple subst., it has a pl., namely مَحَايِضُ. (TA.)