Lower Austral life zone
Lower Austral life zone[′lō·ər ¦ȯs·trəl ′līf ‚zōn]
A term used by C.H. Merriam to describe the southern portion of the Austral life zone, characterized by accumulated temperatures of 18,000°F (10,000°C).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.