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

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

(physics, chemistry) Synonym of conservation of mass

plural of mass extinction event

(evolutionary theory, geology) One of five historical events in which the Earth experienced a loss of ∼75% of all species over a geological interval of less than 3 million years, the most recent being the Cretaceous–Paleogene extinction event 66 million years ago.

Large facilities enabled to vaccinate.

plural of mass haul diagram