نَاسُورٌ

(also written with ص, S, Msb,) A certain disease that happens in the inner angles of the eyes, (S, Msb, K,) with an incessant defluxion therefrom: (S, TA:) and sometimes it happens also in the part around the anus: and in the gum: (S, Msb:) or it signifies also a certain disease in the part around the anus: and a certain disease in the gum: (K:) and is an arabicized word [from the Persian]: (S, Msb:) نَوَاصِير, plural of نَاصُورٌ, according to certain of the physicians, is a term applied to deep ulcers in the anus, at the extremity of the gut. (Msb, article نصر.)

Also, A vein constantly becoming recrudescent, (عِرْقٌ غَبِرٌ,) with an incessant defluxion; (S, K;) corrupt within; whenever its upper part heals, breaking forth again with corruption. (TA.) See also غَرْبٌ.