[ahr-guh-nawt, -not] 
| 1. | Classical Mythology. a member of the band of men who sailed to Colchis with Jason in the ship Argo in search of the Golden Fleece. |
| 2. | (sometimes lowercase ) a person in quest of something dangerous but rewarding; adventurer. |
| 3. | a person who moved to California during the gold rush of 1849. |
| 4. | (lowercase) paper nautilus. |
| ar·go·naut (är'gə-nôt') n. See paper nautilus. [New Latin Argonauta, genus name, from Latin Argonautae, Argonauts; see Argonaut.] |
| Ar·go·naut (är'gə-nôt') n.
[From Latin Argonautae, Argonauts, from Greek Argonautēs, Argonaut : Argō, the ship Argo + nautēs, sailor (from naus, ship; see nāu- in Indo-European roots).] |
| paper nautilus n. A cephalopod mollusk (Argonauta argo) with eight tentacles, the female of which inhabits a paper-thin shell that later acts as an egg case. Also called argonaut. |