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
Word Usage
"One little boy asked Scott Carpenter how his experiences as an "aquanaut" living inside the experimental underwater habitat Sealab compared to his experiences orbiting the Earth as an astronaut."