snub. (mining engineering). To increase the height of an undercut by means of explosives or otherwise. To check the descent of a car by the turn of a rope around a post.
Sessile polyps simply mean that the mass is flat and does not have a stalk. The other types of colonic polyps are pedunculated- these are not flat but attached to a stalk. Since a sessile colonic polyp does not have a stalk, it is usually found very close to the colonic wall lining.
A polyp is a mass of tissue projecting from a mucous membrane, such as the cervix or endometrium. A pedunculated polyp is attached to the mucous membrane by a stalk, which is its blood supply. Endometrial polyps are overgrowths of endometrial glands and stroma in the endometrium. Cervical and endocervical polyps are the most common benign, neoplastic (new) growths of the cervix.