Para rubber

from the GNU version of the Collaborative International Dictionary of English.

• The caoutchouc obtained from the South American euphorbiaceous tree Hevea brasiliensis, hence called the Pará rubber tree, from the Brazilian river and seaport named Pará; also, the similar product of other species of Hevea. It is usually exported in flat round cakes, and is a chief variety of commercial India rubber.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a type of natural rubber obtained from tropical South American trees