from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A free-diving deep-sea vessel consisting of a large flotation hull with a crewed observation capsule attached to its underside, usually capable of reaching full ocean depths.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A self-propelled deep-sea diving submersible for exploring the ocean depths, consisting of a crew cabin similar to a bathysphere suspended below a float filled with a buoyant liquid such as petrol
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. navigable deep diving vessel for underwater exploration
bathy- + Greek skaphos, boat.(American Heritage® Dictionary of the English Language, Fourth Edition)
Borrowing from French, from Ancient Greek βαθύς (bathus, "deep") + σκάφη (skaphē, "little ship"). Coined in 1940s by Auguste Piccard, the inventor of the bathyscaphe. (Wiktionary)