Argo \Ar"go\, n. [L. Argo, Gr. ?.]

1. (Myth.) The name of the ship which carried Jason and his fifty-four companions to Colchis, in quest of the Golden Fleece.

2. (Astron.) A large constellation in the southern hemisphere, called also Argo Navis. In modern astronomy it is replaced by its three divisions, Carina, Puppis, and Vela.

Source: Webster's Revised Unabridged Dictionary (1913)