Imponderable

Pronunciation

• RP IPA: /ɪmˈpÉ’ndəɹəbl/
• US IPA: /ɪmˈpɑːndəɹəbl/

Full definition of imponderable

Adjective

1. Not ponderable; without sensible or appreciable weight; incapable of being weighed.

Noun

1. (physics) An imponderable substance or body; specifically, in the plural, a name formerly applied to heat, light, electricity, and magnetism.