1 Unmounted mint (UM) â the stamp is unused and appears never to have been mounted. 2  Mint never hinged (MNH) â the same as unmounted mint but with an assertion that the stamp is not a formerly mounted stamp that has been tampered with to remove traces of mounting.
vermilion zone, n the external darkish area of the upper and lower lips, extending from the junction of the lips, with the surrounding facial skin on the exterior to the labial mucosa within the oral cavity.
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.