The Collaborative International Dictionary of English v.0.48:
Astronomic \As`tro*nom"ic\, a. Astronomical. [1913 Webster]WordNet (r) 3.0 (2006):
astronomic adj 1: relating or belonging to the science of astronomy; "astronomic telescope" [syn: astronomic, astronomical] 2: inconceivably large [syn: astronomic, astronomical, galactic]