(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.

plural of mass extinction event

plural of mass haul diagram

(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.

(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

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

plural of low mass star

In a single body or group; as one, together.

Alternative form of en masse