1. A line on a map connecting places where the mean height of the barometer at the sea-level is the same.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• disobay,
• sobar,
• isoble,
• izobar,
• isobat,
• isboar,
• issobar,
• Ensobar,
• imbar,
• Isomare,
• ysabau,
• Isonax,
• isopan,
• ismaar,
• isobara,
• isobares,
• isapar,
• isobth,
• isobatth,
• Isebau

• sober.

The adjective form of the word "isobar" is "isobaric".

The plural of the "isobar" can be the "isobars".

The singular of the "isobar" can be the "isobar".