Argonaut

Webster's Practical Dictionary- A Practical Dictionary of the Englih Language · 1884 · p. 33

ar'go-nawt, re. One who sailed to Colchis with Jason, in the Argo, in quest of the golden fleece. (Zobl.) shin. The nautilus. — Argosy, ar'go-sT, n. A large Argot, ar-go', n. The secret language of thieves, tramps, etc.; flash; cant.