(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.

plural of low mass star

(physics, chemistry, dated) Pedantic form of mass number. Symbol: A.

plural of weapon of mass disruption

A weapon used to create large-scale disruption instead of destruction.

(physics, chemistry) a technique of separating ions of different masses by measuring the time taken to traverse a fixed distance through a magnetic field

(physics) A technique used to visualize the three-dimensional structure of solids by employing an energetic ion beam to fragment the atomic or molecular constituents from a surface

(astronomy) a protium-fusing star with minimal mass, which is fully convective, able to process its entire hydrogen supply

plural of very low mass star

Synonym of Triassic-Jurassic extinction event.