from the GNU version of the Collaborative International Dictionary of English
- adj. the ratio of the square roots, or the square root of a ratio.
Sorry, no etymologies found.
The orbital paths of the planets are in the simple ratio of the distances; the weights or quantities of matter in different planets are in the subduplicate ratio of the same distances, as has been already proved; so that with every increase of distance a planet has more matter and therefore is moved more slowly, and accumulates more time in its revolution, requiring already, as it did, more time by reason of the length of the way.