molecular beam

noun Physics.

a stream of molecules freed from a substance, usually a salt, by evaporation and then passed through a narrow slit for focusing, for investigating the properties of nuclei, atoms, and molecules.
Also called molecular ray.

Words nearby molecular beam

mole run, mole salamander, molech, molecular, molecular astronomy, molecular beam, molecular biology, molecular clock, molecular cloud, molecular disease, molecular distillation

British Dictionary definitions for molecular beam

molecular beam

molecular ray

noun

physics a parallel beam of molecules that are at low pressure and suffer no interatomic or intermolecular collisions