'natural rubber' definitions:

Definition of 'natural rubber'

From: WordNet
noun
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 [syn: rubber, natural rubber, India rubber, gum elastic, caoutchouc]

Definition of 'natural rubber'

From: GCIDE
  • Rubber \Rub"ber\, n.
  • 1. One who, or that which, rubs. Specifically: (a) An instrument or thing used in rubbing, polishing, or cleaning. (b) A coarse file, or the rough part of a file. (c) A whetstone; a rubstone. (d) An eraser, usually made of caoutchouc or a synthetic rubber[4]. (e) The cushion of an electrical machine. (f) One who performs massage, especially in a Turkish bath. (g) Something that chafes or annoys; hence, something that grates on the feelings; a sarcasm; a rub. --Thackeray. [1913 Webster]
  • 2. In some games, as bridge or whist, the odd game, as the third or the fifth, which decides the winner when there is a tie between the players; as, to play the rubber; also, a contest determined by the winning of two out of three games; as, to play a rubber of whist. --Beaconsfield. "A rubber of cribbage." --Dickens. [1913 Webster]
  • 3. India rubber; caoutchouc; gum elastic; -- also called natural rubber. [1913 Webster +PJC]
  • 4. Any substance, whether natural or synthetic, resembling India rubber with respect to its elasticity[1]. [PJC]
  • 5. A low-cut overshoe made of natural or synthetic rubber[4], serving to keep the feet and shoes dry when walking in the rain or on a wet surface; -- usually used in the plural. [1913 Webster]
  • 6. A condom. [Slang] [PJC]
  • Antimony rubber, an elastic durable variety of vulcanized caoutchouc of a red color. It contains antimony sulphide as an important constituent.
  • Hard rubber, a kind of vulcanized caoutchouc which nearly resembles horn in texture, rigidity, etc.
  • India rubber, caoutchouc. See Caoutchouc.
  • Rubber cloth, cloth covered with caoutchouc for excluding water or moisture.
  • Rubber dam (Dentistry), a shield of thin sheet rubber clasped around a tooth to exclude saliva from the tooth. [1913 Webster]