Crossword Clue:

Line on a weather map showing equal temperatures

AnswerCrossword Clue
ISOTHERMLine on a weather map showing equal temperatures
ISOGRAMWeather-map line denoting equal temperatures.
ISOBARLine on a weather map
FRONTLine on a weather map
ISOBARLine on a weather map.
ISOGRAMLine on a weather map.
ISOTHERMLine on a weather map
ISOHELLine on a weather map
ISOBARLine on a weather report map