Mouth

The proximal terminus of the alimentary canal extending from the lips to the pharynx. The cavity in which mastication takes place. Also, the termination of any canal. M. -breather, a person who habitually breathes through the mouth. M. -breathing, respiration through the oro-pharynx instead of, as normally, through the naso-pharynx. M. -protector, an appliance used to protect the lips and cheeks in using the discs with the dental engine. M., Sore. See Aphtha and Stomatitis. M.-wash, a gargle; any liquid preparation for the mouth and fauces.