The weighted average of the atomic masses of the naturally occurring isotopes of an element.

(mathematics) A function that gives the relative probability that a discrete random variable is exactly equal to some value.

(astronomy) a relationship that specifies the mass distribution of a newly formed stellar population

A statistical measure of the weight of a person scaled according to height, used to estimate if a person is underweight or overweight. BMI units are defined as kg/m² ≈ 703*lb/in².

(embryology) A mass of cells within a primordial embryo that will eventually develop into the distinct form of a fetus in most eutherian mammals.

(physics) The mass of an object measured via the gravitational force experienced by it in a known gravitational field

(physics) The mass of an object measured via the gravitational force that it exerts

(physics, chemistry) Synonym of conservation of mass

(astronomy) A fully-convective red dwarf or M dwarf star

(construction) A diagram illustrating the amounts of material that will be cut from the terrain and used to fill other areas, for example when building a railway.