Category:Imponderable

Im*pon"der*a*ble, a. Etym: [Pref. im- not + ponderable: cf. F. impondérable.]

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

imponderable Im*pon"der*a*ble, n. (Physics)

Defn: An imponderable substance or body; specifically, in the plural, a name formely applied to heat, light, electricity, and magnetism, regarded as subtile flyids destitute of weight but in modern science little used.