Archaic Definition of the Week – Secular Inequality

ADOTWINEQUALITY, SECULAR. _ A small irregularity in the motion of planets, which becomes important only after a long lapse of years. The great inequality of Jupiter and Saturn is a variation of their orbital positions, caused by the disturbing action of one planet on the other.

The Sailor’s Word Book (1867) by Admiral W. H. Smyth

You may also like...