Argo

[ahr-goh] /ˈɑr goʊ/
noun, genitive Argus
[ahr-guh s] /ˈɑr gəs/ (Show IPA), for 1.
1.
Astronomy. a very large southern constellation, now divided into Vela, Carina, Puppis, and Pyxis, four separate constellations lying largely south of Canis Major.
2.
(italics) Classical Mythology. the ship in which Jason sailed in quest of the Golden Fleece.
Related forms
Argoan, adjective
British Dictionary definitions for Argo

Argo1

/ˈɑːɡəʊ/
noun
1.
(Greek myth) the ship in which Jason sailed in search of the Golden Fleece

Argo2

/ˈɑːɡəʊ/
noun (Latin genitive) Argus (ˈɑːɡəs)
1.
an extensive constellation in the S hemisphere now subdivided into the smaller constellations of Puppis, Vela, Carina, and Pyxis Also called Argo Navis (ˈneɪvɪs)
Word Origin and History for Argo

name of the ship in which Jason and his companions sought the Fleece in Colchis, in Greek, literally "The Swift," from argos "swift" (adj.), an epithet, literally "shining, bright" (see argent; cf. also Sanskrit cognate rjrah "shining, glowing, bright," also "swift"), "because all swift motion causes a kind of glancing or flickering light" [Liddell and Scott].