·adj ·Alt. of Periodical.
II. Periodic ·adj Pertaining to, derived from, or designating, the highest oxygen acid (HIO/) of iodine.
Those disturbances in the planetary motions, caused by their reciprocal attraction in definite perio...
The Sailor's Word-Book
The interval of time which elapses from the moment when a planet or comet leaves any point in its or...