IMPONDERABLE

An Illustrated Encyclopedic Medical Dictionary · 1893 · p. 19

adj. I2m-poan'dear-a2-b'l. Lat., imponderabilis. Fr., imponderable. Ger.. unwdgbar. Incapable or being weighed; without weight. The i's (Lat.. imponderabilia) of the old authors included heat, light, electricity, magnetism, etc. [L, 30, 41, 44, 107 (a, 14).] [s. 441]