(chemistry) A unit of mass equal to 1/12 the mass of an atom of the ¹²C isotope of carbon.

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

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

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

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.

(physics) A form of mass spectrometry in which ions are accelerated to extraordinarily high kinetic energies before mass analysis.

plural of body mass index

plural of atomic mass unit

plural of coronal mass ejection

(astronomy) A massive burst of solar wind, other light isotope plasma, and magnetic fields rising above the solar corona or being released into space.