an optical device for viewing objects below the surface of water.

Origin of hydroscope

First recorded in 1670–80; hydro-1 + -scope
Related formshy·dro·scop·ic [hahy-druh-skop-ik] /ˌhaɪ drəˈskɒp ɪk/, hy·dro·scop·i·cal, adjectivehy·dro·sco·pic·i·ty [hahy-druh-skoh-pis-i-tee] /ˌhaɪ drə skoʊˈpɪs ɪ ti/, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for hydroscope

Historical Examples of hydroscope

  • The former was a hydroscope, who fell into convulsions whenever he passed over running water.

  • He knelt for some time longer, watching the fish, before he resigned the hydroscope to me.


    Robert W. Chambers

British Dictionary definitions for hydroscope



any instrument for making observations of underwater objects
Derived Formshydroscopic (ˌhaɪdrəˈskɒpɪk) or hydroscopical, adjective
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