from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A synthetic rubber made from the polymerization of butadiene and sodium.
from the GNU version of the Collaborative International Dictionary of English
- n. a synthetic rubber made by copolymerizing butadiene with another substance such as acrylonitrile or styrene.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. made by polymerizing butadiene
Originally a trademark.(American Heritage® Dictionary of the English Language, Fourth Edition)