caou·tchouc (kou?cho?ok?, -cho?ok?)n. See rubber1.[French, probably from Spanish caucho, from Tupí cau-ucha.]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.caoutchouc (?ka?t?u?k; -t??k; ka??t?u?k; -?t??k) n (Elements & Compounds) another name for rubber11[C18: from French, from obsolete Spanish cauchuc, from Quechua]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014rub?ber1 (?r?b ?r) n. 1. a highly elastic solid substance, light cream or dark amber in color, polymerized by the drying and coagulation of the latex or milky juice of rubber trees and plants, esp. of the Hevea and Ficus species. 2. a material made by chemically treating and toughening this substance, used in the manufacture of electrical insulation, elastic bands, tires, and other products. 3. any of various similar substances and materials made synthetically. 4. an eraser of this material. 5. a low overshoe of this material. 6. rubber band. 7. an instrument or tool used for rubbing, polishing, scraping, etc. 8. a person who rubs something. 9. a person who gives massages. 10. Baseball. an oblong piece of white rubber or other material embedded in the pitcher’s mound. 11. Slang. a condom. adj. 12. made of, containing, or coated with rubber. rub?ber2 (?r?b ?r) n. 1. (in bridge) a series or round played until one side has won two out of three games. 2. Also called rub?ber match`. a deciding contest when a competition is tied. [1585?95] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.