'argonaut' definitions:

Definition of 'argonaut'

(from WordNet)
noun
Someone engaged in a dangerous but potentially rewarding adventure
noun
(Greek mythology) one of the heroes who sailed with Jason in search of the Golden Fleece
noun
Cephalopod mollusk of warm seas whose females have delicate papery spiral shells [syn: paper nautilus, nautilus, Argonaut, Argonauta argo]