motility
This term is strictly technical and resides almost exclusively within the realms of microbiology, medicine, and cellular biology. It describes a biological capacity rather than a simple action, focusing on the internal machinery—like flagella or cilia—that allows a cell to navigate its environment. In a clinical context, it is frequently used to describe the movement of muscles in the digestive tract. When doctors discuss gastric motility, they are referring to the coordinated contractions that push food through the gut, distinguishing this involuntary physiological process from the conscious movement of a limb.
Used to describe the general capacity for movement in a biological system, such as discussing the motility of sperm or the motility of the intestines.