fir needle oil
fir needle oil[′fər ‚nēd·əl ‚ȯil]
An essential oil distilled from the needles and twigs of some trees of the genus Abies; used in perfumery, flavoring, and medicine. Also known as fir oil.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.