Isobar - Dictionary Definition and Overview

Isobar :  (noun)

1: an isogram connecting points having equal barometric pressure at a given time

Based on WordNet 2.0

Isobar : \I"so*bar\, n. [Iso- _ Gr. ? weight.] (Phys. Geog.) A line connecting or marking places upon the surface of the earth where height of the barometer reduced to sea level is the same either at a given time, or for a certain period (mean height), as for a year; an isopiestic line. [Written also isobare.]

Based on Webster's Revised Unabridged Dictionary

Isobar : \I"so*bar\, n. The quality or state of being equal in weight, especially in atmospheric pressure. Also, the theory, method, or application of isobaric science.

Based on Webster's Revised Unabridged Dictionary (1913)
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