massless
adjUS /ˈmæs.ləs/
Etymology From mass + -less.
1
Having no mass.
- The photon is a massless particle.
- On the other hand, Pauli had just proposed a massless, chargeless, colorless, flavorless particle whose sole reason for existence was to preserve the principle of momentum conservation.2014, Mark A. Cunningham, Neoclassical Physics, page 241:
- Antonyms
- massive
- Derived terms
- masslessness