As′tro‐nom″ic‐al (–ĭ‐kal), a. [L. astronomicus, Gr. αστρονομικὄσ: cf. F. astronomique.] Of or pertaining to astronomy; in accordance with the methods or principles of astronomy. — As′tro‐nom″ic‐al‐ly, adv.
Astronomical clock. See under Clock. — Astronomical day. See under Day. — Astronomical fractions, Astronomical numbers. See under Sexagesimal.