Mineralization. The conversion of organic matter to inorganic matter.

Mineral salt. Any inorganic homogeneous solid such as sodium, phosphorus, chlorine.

Miscarriage. The expulsion of a foctus before it is viable outside the womb.

Mitochondria (Chondriosomes).
Microscopic bodies occurring in cytoplasm of every cell in varying numbers (up to 2,500 per cell in rat liver) except in bacteria and blue-green algae. Most are granular, rod, or thread-shaped, about 0.5 micrometer in width or diameter; thred-like forms up to 10 micrometers or more long. Stain specifically in living cell with Janus Green (due to presence of cytochrome oxidase system which keeps dyes in oxidized (coloured form).
Bounded on outside by two unit membranes within is a dense matrix. The outside by two unit membranes is folded inwards at a number of places so as to project into the matrix as cristae (crests), which are covered by an elementary particles containing components of oxidative enzyme systems. Cristate vary in number, and are usually lamellate, but may be tubular or branched. Mode of mitochondrial multiplication not yet resolved probably by division.

Mitosis. The division by which the cell nucleus and cytoplasm divide in two. It is divisible into karyokinesis and cytokinesis. It has four phases; prophase, metaphase, anaphase, and telophase

Mitospore. Spore produced as result of mitosis

Mitral valve. Bicuspid valve between left auricle and left ventricle of mammalian heart, consisting of two membranous flaps.

ML. For multilitre, represented as cm³.

Mode. The most frequently observed value in a series of observation, i.e. the peak of a frequency distribution.

Molality. The number of Moles of a solute present in a kilogram of pure solvent.