mercury. Quicksilver.

metastasis. A change in the seat of disease.

metatarsalgia. Pain in the metatarsus.

metatarsophalangeal. Relating to the metatarsal bones and the phalanges.

meter. Measure, as in meter, a measure of length, the equivalent of 39.3 inches.

microbe. A minute one-celled microorganism.

micrococcus. A genus of schizomycetes.

microorganism. A minute living body.

miliary. Like millet seeds, in size.