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.

plural of probability mass function

(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 that it exerts

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