gum resin

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of various plant exudates that are mixtures of gum and resin.

from The Century Dictionary.

• noun A vegetable secretion formed of resin mixed with more or less gum or mucilage.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A mixture of gum and resin secreted by a plant.

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

• noun a mixture of resin and gum