From WordNet (r) 3.0 (2006) [wn]:
Jason
n 1: (Greek mythology) the husband of Medea and leader of the
Argonauts who sailed in quest of the Golden Fleece
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Jason \Jason\ prop. n.
the husband of Medea and leader of the Argonauts who sailed
in quest of the Golden Fleece.
[WordNet 1.5]