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Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. See aquanaut.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An explorer in a submarine.
  • n. Someone who lives or works underwater, for scientific reasons.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a skilled worker who can live in underwater installations and participate in scientific research

Etymologies

ocean +‎ -naut, also from astronaut. (Wiktionary)

Examples

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