— isobarism , n.
/uy"seuh bahr'/ , 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, isobare /uy"seuh bair'/ . Physics, Chem. one of two or more atoms having equal atomic weights but different atomic numbers. Cf. isotope .
[ 1860-65; isobarés of equal weight. See ISO-, BARO- ]