from The American Heritage® Dictionary of the English Language, 4th Edition
- n. See rubber1.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. latex; natural rubber
from the GNU version of the Collaborative International Dictionary of English
- n. A tenacious, elastic, gummy substance obtained from the milky sap of several plants of tropical South America (esp. the euphorbiaceous tree Siphonia elastica or Hevea caoutchouc), Asia, and Africa. Being impermeable to liquids and gases, and not readly affected by exposure to air, acids, and alkalies, it is used, especially when vulcanized, for many purposes in the arts and in manufactures. Also called India rubber (because it was first brought from India, and was formerly used chiefly for erasing pencil marks) and gum elastic. See vulcanization.
from The Century Dictionary and Cyclopedia
- n. An elastic gummy substance, the inspissated milky juice of various tropical trees belonging to the natural orders Apocynaceæ, Urticaceæ, and Euphorbiaceæ; india-rubber (which see).
- n. Products more or less resembling caoutchouc are obtained by the application of the vulcanizing process to colza and other oils, and are employed to mix with or partly replace real india-rubber. A substance which seems to be identical with natural caoutchouc has been obtained in the scientific laboratory by polymerization of isoprene, a hydrocarbon derived from turpentine; but the process has not become commercially practical.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an elastic material obtained from the latex sap of trees (especially trees of the genera Hevea and Ficus) that can be vulcanized and finished into a variety of products
French, probably from Spanish caucho, from Tupi cau-ucha.(American Heritage® Dictionary of the English Language, Fourth Edition)
French caoutchouc, from the South American name. (Wiktionary)