Return to Book List Grade 7     Glossary   Choose a Letter | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |   List of words for Letter 'M' Click on    to hear the word and definition. methamphetamine A type of amphetamine that produces short-term feelings of elation followed by feelings of depression.   migraine Severe head pain caused by the widening of blood vessels in the brain.   mineral A nutrient that is involved in many of the body's activities.   miscarriage The accidental ending of a pregnancy before the developing baby is ready to be born.   monogamous (muh•NAH•guh•muhs) Having sex only with your marriage partner.   mononucleosis (mah•noh•noo•klee•OH•suhs) A viral infection that causes extreme fatigue; also called mono.   mucous membranes The tissues that line the nose, mouth, and throat.  muscular endurance The ability to use muscles for an extended period of time.   muscular strength The ability of muscles to lift, pull, push, kick, and throw with force.  muscular system The body system made up of muscles--long, elastic fibers that control the body's movements.  Leave Glossary