Meaning of element zero | Babel Free

Definitions

1. Synonym of neutronium (“material composed of neutrons”).
   informal, uncountable
2. Synonym of muonium.
   informal, uncountable
3. A fictional chemical element with element number/atomic number/proton number zero (0), often with unrealistic properties.
   uncountable
4. Used other than figuratively or idiomatically: see element, zero.
   uncountable

CEFR level