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master mechanic a highly skilled mechanic, esp. one who supervises other mechanics.
mastermind to cleverly plan and supervise the development of. [2 definitions]
Master of Arts a graduate degree, below that of doctor, that is given by a college or university to a person who has completed a prescribed course of graduate study in the humanities or social sciences; master's degree. (abbr.: M.A.)
master of ceremonies one who hosts a formal event or entertainment, usu. making speeches or announcing guests; emcee.
Master of Science a master's degree awarded usu. in science, technology, or mathematics. (abbr.: M.S.)
masterpiece a work of art of the highest quality. [2 definitions]
master's degree a degree that you get after finishing an advanced program of study at a college or university.
master sergeant in the U.S. military, a noncommissioned officer of high rank, second only to the rank of sergeant major.
mastership the state of being a master; authority; control. [3 definitions]
masterstroke an extremely clever or skillful action or accomplishment.
masterwork an art work of the finest quality; masterpiece.
mastery the qualities of skill, knowledge, and expertise. [3 definitions]
masthead the top of a ship's mast. [2 definitions]
mastic an aromatic gum or resin from the bark of a small evergreen tree of the Mediterranean region, used as an astringent and an ingredient in varnish. [3 definitions]
masticate to grind (food) with the teeth; chew. [2 definitions]
masticatory of, relating to, or used in mastication; adapted for chewing. [2 definitions]
mastiff one of a breed of large, strong dogs that have a short, light brown coat and are often used as watchdogs.
mastitis an inflammation of the breast or udder.
masto- breast.
mastodon any of a number of extinct mammals of about two million years ago that were large and resembled the elephant.
mastoid of or pertaining to the lower portion of the bone behind the ear in humans and other vertebrates. [3 definitions]