MS Scientific & Educational Abbreviation

Microelectromechanical System

Military Standard

Mild Steel

Carbon steel containing a maximum of about 0.25% C. A low-carbon steel of ordinary production. A description generally taken to mean a non-alloy steel with a maximum carbon content of about 0.25%. Structural steelwork and reinforcement generally come in two qualities mild steel and high-tensile steel, the latter being stronger but more expensive.

Main Sequence

In astronomy, the main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness. These color-magnitude plots are known as Hertzsprung–Russell diagrams after their co-developers, Ejnar Hertzsprung and Henry Norris Russell.

Master Schedule

Mean Squared

Millisecond

Millisecond One thousandth of a second.

Mass

The quantity of matter in a body as measured by the ratio of the force required to produce a given acceleration, to the acceleration. A property of all matter. It is measured in, for example, grams. Mass is independent of gravity, unlike weight which depends on gravity. The quantity of matter in a body. It can be determined by measuring the force of gravity (weight) acting on it and dividing this by the gravitational acceleration at that point. Thus, the mass of a given body remains the same everywhere, while its weight changes with the gravitational attraction.

Marker

An identifiable physical location on a chromosome (e.g., restriction enzyme cutting site, gene) whose inheritance can be monitored. Markers can be expressed regions of DNA (genes) or some segment of DNA with no known coding function but whose pattern of inheritance can be determined. A gene of known location on a chromosome and phenotype that is used as a point of reference in the mapping of other loci.