Dictionary![]() ![]() i•so•barPronunciation: (ī'su-bär"), [key] —n. 1. Meteorol.a line drawn on a weather map or chart that connects points at which the barometric pressure is the same. 2. Also,i•so•barePronunciation: (ī'su-bâr"). [key] Physics, Chem.one of two or more atoms having equal atomic weights but different atomic numbers. Cf. isotope. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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