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bathyscaphe

[bath-uh-skeyf, -skaf] /ˈbæθ əˌskeɪf, -ˌskæf/
noun, Oceanography
1.
a navigable, submersible vessel for exploring the depths of the ocean, having a separate, overhead chamber filled with gasoline for buoyancy and iron or steel weights for ballast.
Also, bathyscaph
[bath-uh-skaf] /ˈbæθ əˌskæf/ (Show IPA),
bathyscape
[bath-uh-skeyp] /ˈbæθ əˌskeɪp/ (Show IPA)
.
Origin
1947
1947; < French, equivalent to bathy- bathy- + Greek skáphos ship; coined by Auguste Piccard
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for bathyscaphe

bathyscaph

/ˈbæθɪˌskæf/
noun
1.
a submersible vessel having a flotation compartment with an observation capsule underneath, capable of reaching ocean depths of over 10 000 metres (about 5000 fathoms)
Word Origin
C20: from bathy- + -scaph, from Greek skaphē light boat
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for bathyscaphe
n.

"diving apparatus for reaching great depths," 1947, name coined by its inventor, Swiss "scientific extremist" Prof. Auguste Piccard (1884-1962), from Greek bathys "deep" (see benthos) + skaphe "light boat, skiff" (see skaphoid).

Online Etymology Dictionary, © 2010 Douglas Harper
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bathyscaphe in Science
bathyscaphe
  (bāth'ĭ-skāf', -skāf')   
A free-diving vessel used to explore the ocean at great depths. The original bathyscaphe, constructed in 1948, was made of a cylindrical metal float and a suspended steel ball that could hold two people. The float contained gasoline used to lift the vessel, and heavy iron material used for ballast. Design improvements allowed the second bathyscaphe in 1960 to descend to a record 10,912 m (35,791 ft) in the Marianas Trench in the western Pacific Ocean, almost to the deepest level ever sounded on Earth.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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