O‐ri″on (ō̍‐rī″ŏn), n. [L., fr. Gr. Ωρἴων, orig., a celebrated hunter in the oldest Greek mythology, after whom this constellation was named.] (Astron.) A large and bright constellation on the equator, between the stars Aldebaran and Sirius. It contains a remarkable nebula visible to the naked eye.
The flaming glories of Orion's belt. E. Everett.