from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A scuba diver trained to work in underwater installations and conduct, assist in, or be a subject of scientific research. Also called oceanaut.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An underwater explorer.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an underwater swimmer equipped with a face mask and foot fins and either a snorkel or an air cylinder
- n. a skilled worker who can live in underwater installations and participate in scientific research
aqua- + Greek nautēs, sailor; see nāu- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
aqua- + -naut (Wiktionary)