delta ray
noun Physics.
a low-energy electron emitted by a substance after bombardment by higher-energy particles, as alpha particles.
Origin of delta ray
First recorded in 1905–10
Words nearby delta ray
delta force,
delta function,
delta granule,
delta iron,
delta particle,
delta ray,
delta rhythm,
delta stock,
delta team,
delta virus,
delta wave
British Dictionary definitions for delta ray
delta ray
noun
a particle, esp an electron, ejected from matter by ionizing radiation