abietine

abietine

[′a·bē·ə‚tēn]
(materials)
The distillate of the gums of the Jeffrey and digger pines; comprises 96% heptane; used as a cleaning agent, insecticide, and constituent of standard gasolines to measure detonation of engines.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.