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1. Geography the lowest point of a ridge connecting two mountain peaks, often constituting a pass
2. Meteorol a pressure region between two anticyclones and two depressions, associated with variable weather
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
A high, sharp-edged pass occurring in a mountain ridge, usually produced by the headward erosion of opposing cirques.
The point of intersection of a trough and a ridge in the pressure pattern of a weather map; it is the point of relatively lowest pressure between two highs and the point of relatively highest pressure between two lows. Also known as neutral point; saddle point.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
On drawings, abbr. for column.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
An area of almost uniform pressure between two highs and two lows. No isobars define its boundary. The two isobars on two low-pressure sides have the same value. However, isobars on anticyclonic sides have equal value but at one interval higher. Also referred to as saddleback shape.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved