1. .... _____ distance (of a planet from the sun) (Astron.), the average of the distances throughout one revolution of the planet, equivalent to the semi...
2. ...The interval by which the curtate distance of a planet is less than the true distance.
3. .... The planets and comets had been _____ing in the sun. Cheyne.
4. ...Having the orbital index relatively large; having the orbits narrow transversely; -- opposed to microseme.