Imponderability :: Imponderability (n.) The quality or state of being imponderable; imponderableness.
Imponderable :: Imponderable (a.) Not ponderable; without sensible or appreciable weight; incapable of being weighed.
Imponderable :: Imponderable (n.) An imponderable substance or body; specifically, in the plural, a name formerly applied to heat, light, electricity, and magnetism, regarded as subtile fluids destitute of weight but in modern science little used..
Imponderableness :: Imponderableness (n.) The quality or state of being imponderable.