| 释义 |
mass movement
mass movement[′mas ′müv·mənt] (geology) Movement of a portion of the land surface as a unit. mass movement
mass per·i·stal·sisforcible peristaltic movements of short duration, occurring only three or four times a day, which move the contents of the large intestine from one division to the next, as from the ascending to the transverse colon. Synonym(s): mass movementmass movement The shift of an appreciable proportion of the colonic faecal contents into the rectum in a single process occasioned by contraction of a long segment of colon. Mass movement is quickly followed by the desire to defaecate. |