| Mesolithic |
(sometimes l.c.) designating the Stone Age cultural period from about 10,000 to about 8,000 B.C., between the Paleolithic and the Neolithic periods, characterized by the use of small flint tools set in bone or wood. |
| mesomorphic |
of or pertaining to a muscular human body type. (Cf. ectomorphic, endomorphic.) |
| meson |
any of a group of elementary particles that react strongly with other particles, and that have a mass between that of the electron and that of the proton. |
| mesosphere |
the earth's atmosphere between the stratosphere and the thermosphere, or from twenty miles to fifty miles above the earth's surface. |
| mesothelioma |
a tumor of the mesothelium, often malignant and possibly caused by the breathing in of particles of asbestos. |
| mesothelium |
the cell layer that lines such body cavities as the heart, chest, and abdomen. |
| Mesozoic |
of, relating to, or designating the geological era between the Paleozoic and the Cenozoic, from approximately 220 million to 65 million years ago, when dinosaurs appeared and became extinct and ferns were abundant. [2 definitions] |
| mesquite |
any of several shrubs or small trees of the legume family, found in the southwestern United States and Mexico, which bear pods rich in sugar that are used as fodder for livestock. [2 definitions] |
| mess |
a state of dirtiness or disorder, or something characterized by such. [11 definitions] |
| message |
a communication of usu. quite specific information by speech, writing, symbols, or other means. [7 definitions] |
| messaging |
the practice of sending and receiving electronic messages by computer or mobile device. |
| mess around |
(informal) to putter or spend time idly. [2 definitions] |
| messenger |
a person who transports and delivers a message or package, or does this regularly as a job. |
| messenger RNA |
a single-stranded molecule of ribonucleic acid that carries a code from the DNA, where it is synthesized, to the cytoplasm, where it specifies the sequence of amino acids required for protein synthesis. |
| mess hall |
a room or building in which a group of people, such as soldiers, regularly eat their meals. |
| Messiah |
according to Old Testament prophecies, the anticipated deliverer of the Jews. [3 definitions] |
| messieurs |
pl. of monsieur. |
| messiness |
the condition of being very untidy or unkempt. [2 definitions] |
| mess jacket |
a man's close-fitting, waist-length jacket, worn as part of a uniform. |
| mess kit |
a set of cooking and eating utensils arranged in a compact kit, used by campers and soldiers in the field. |
| messmate |
a person with whom one eats meals regularly, as in the army. |