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heat equator[′hēt i¦kwād·ər]
The line which circumscribes the earth and connects all points of highest mean annual temperature for their longitudes.
The parallel of latitude of 10°N, which has the highest mean temperature of any latitude. Also known as thermal equator.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.