hy·dro·scope
(hī′drə-skōp′)n. An optical device used for viewing objects far below the surface of water.
hy′dro·scop′ic (-skŏp′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
hydroscope
(ˈhaɪdrəˌskəʊp) n (Nautical Terms) any instrument for making observations of underwater objects
hydroscopic, ˌhydroˈscopical adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
hydroscope
a device for viewing things below the surface of a body of water.
See also: Water-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.