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.
Polyps in the gallbladder are common and often are found on ultrasound examinations of the abdomen. Typically, they are small and do not cause symptoms. Small gallbladder polyps (smaller than one centimeter in size) are almost always benign. Malignant polyps usually are larger than one centimeter, and the larger the polyp, the more likely it is to be malignant. It is recommended that polyps larger than one centimeter in size be removed surgically.