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molten made liquid, esp. by extreme heat, as metal or rock; melted. [3 definitions]
molto much; very (used in musical directions).
molybdenite a soft gray mineral resembling graphite that is the principal ore of molybdenum.
molybdenum a chemical element that has forty-two protons in each nucleus and that occurs as a very hard, dense, silver-white solid metal that is often alloyed with other metals, esp. iron, to increase their hardness. (symbol: Mo)
mom (informal) mother.
mom and pop store (informal) a small store or business, usu. owned and run by family members.
moment a very brief, indefinite amount of time. [4 definitions]
momentarily for a moment. [2 definitions]
momentary lasting only a moment. [2 definitions]
momently from moment to moment. [3 definitions]
moment of truth the precise moment in a bullfight when the bullfighter moves to kill the bull. [2 definitions]
momentous of very great significance or importance.
momentum in physics, a quantity that characterizes the motion of a body, equal to its mass multiplied by its velocity. [2 definitions]
mommy (informal) mother; mama.
Mon. abbreviation of "Monday," the second day of the week, occurring between Sunday and Tuesday.
Monaco a tiny Mediterranean country almost completely surrounded by France. [2 definitions]
monad a single indivisible physical unit or metaphysical entity, esp. in philosophy. [3 definitions]
monandrous having only one husband at a time. (Cf. polyandrous.) [2 definitions]
monandry the practice or condition of having only one husband at a time. (Cf. polyandry.)
monarch a sole, often hereditary ruler such as a king, queen, or emperor. [2 definitions]
monarch butterfly a large orange, black, and white migratory butterfly.