بَاسُورٌ

A well-known disease; (K;) a swelling, or tumour, which nature drives to every part of the body, from a humour that comes from the anus (المَقْعَدَة), and the testicles, and the edges of the labia majora of the pudendum muliebre, and other parts; and when in the anus, attended by a swelling of the veins; (Msb;) singular of ; (S, K;) which signifies a certain disease that arises in the anus (المقعدة), [namely, the hemorrhoids, or piles, to which this term generally applies when it is used absolutely,] and also in the inside of the nose; (S;) what resembles boils in the anus: (Mgh:) sometimes the س is changed into ص: (Mgh, Msb:) and it is said that the word is not Arabic. (Msb.)