Definition of Alphard
astronomy
: an orange star of the second magnitude that is the brightest star in the constellation Hydra
- Hydra is actually the largest constellation. Despite its size, it has only one bright star named Alphard. It can be found over in the southwest sky all by itself—hence the name, which in Arabic means “the solitary one.”
- —Kevin D. Conod, The Star-Ledger (Newark, New Jersey), 17 May 2011
