aquanaut Syllabification: (aq·ua·naut)Pronunciation: /ˈäkwəˌnôt, ˈak-/Definition of aquanaut noun a person who swims underwater using an aqualung. Origin: late 19th century: from Latin aqua 'water' + Greek nautēs 'sailor'aquanaut in other Oxford dictionaries Definition of aquanaut in the British & World English dictionary
