First, a definition. Steaks are basically any piece of meat that falls under the category of fast-cooking cutsâcuts that are low enough in connective tissue that they don't require the long cooking times that slow-cooking cuts require. The difference between a steak and roast essentially comes down to size.
Medical Definition of ORBICULARIS ORIS. : a muscle made up of several layers of fibers passing in different directions that encircles the mouth and controls most movements of the lips (as compressing, closing, or pursing movements).edical Definition of ORBICULARIS ORIS. : a muscle made up of several layers of fibers passing in different directions that encircles the mouth and controls most movements of the lips (as compressing, closing, or pursing movements).
Lips are the structure which covers the opening of the mouth and consists of the upper and the lower lips. Each of the lip is surrounded by the orbicularis oris muscle which encircles its opening.[1] Lip twitching is the sudden abnormal involuntary contractions of the lip muscles. It may sometimes involve the upper, lower or both the lips together. It might be due to some direct stimulation or due to irritation of the nerve supplying the muscles surrounding the lips.