عِرْسٌ
1.
A man's wife: (S, Mgh, O, Msb, K:) and a woman's husband: (O, Msb, K:) plural (in both senses, TA) أَعْرَاسٌ: (S, O, Msb, K, TA:) the dual, عِرْسَانِ, is sometimes applied to the male and female, (S, O,) or husband and wife: (TA:) and to a male and female ostrich: (IB:) and the singular, to the mate of the lion: (S, A, O, K:) and the plural is applied, metaphorically, by Málik Ibn-Khuweylid El-Hudhalee, to lions. (TA.)
2.
اِبْنُ عِرْسٍ [The weasel; and a weasel;] a certain small animal, (Lth, S, O, Msb, K,) well known, (TA,) resembling the rat (الفَأْرَة), (Msb,) smaller than the cat, (Lth, O, TA,) having the lower lip cleft (أَشْتَرُ), and very short ears, as though they were amputated, (Lth, O, K,) and having a canine tooth; (TA;) called in Persian
رَاسُوْ: (S, Mgh:) the name is determinate and indeterminate: (TA:) plural بَنَاتُ عِرْسٍ, (S, Msb, K,) applied to the males and the females; (O, K;) like as you say اِبْنُ اوَى and اِبْنُ مَخَاضٍ and اِبْنُ لَبُونٍ and اِبْنُ مَاءٍ, and in the plural بَنَاتُ اوَى and بَنَاتُ مَخَاضٍ and بَنَاتُ لَبُونٍ and بَنَاتُ مَاءٍ; or, according to Akh, you say بَنَاتُ عِرْسٍ and بَنُو عِرْسٍ, like بَنَاتُ نَعْشٍ and بَنُو نَعْشٍ. (S, O.)