astrŏnŏmĭcus, a, um, adj., = ἀστρονομικός,
astronomical : Astrŏnŏmĭca , ōrum, n., the tille of an unfinished poem by Manilius , and of a treatise by Hyginus.
A ring of brass used formerly in navigation. In 1575 Martin Frobisher, when fitting out on his first...
The Sailor's Word-Book