SG Heritage Dictionary

Imponderable [\N] Webster's Dictionary 1828

1. IMPON'DERABLE

2. IMPON'DEROUS, adjective [in and ponderable, ponderous.]

3. Not having sensible weight.

Imponderable [Adjective] Webster's Dictionary 1913

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

Imponderable [Noun] Webster's Dictionary 1913

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 [Noun] Webster's Dictionary 1913

The quality or state of being imponderable.