Dictionary
as•tro•nom•i•cal
Pronunciation: (as"tru-nom'i-kul), [key]—
adj.
1. of, pertaining to, or connected with astronomy.
2. extremely large; exceedingly great; enormous:
It takes an astronomical amount of money to build a car factory. Also,as"tro•nom'ic.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.