Word: isobar
Word origin: mid 19th century: from Greek isobaros ‘of equal weight’, from isos ‘equal’ + baros ‘weight’.
Phonetic:
ˈʌɪsə(ʊ)bɑː
Listen:
a line on a map connecting points having the same atmospheric pressure at a given time or on average over a given period.
each of two or more isotopes of different elements, with the same atomic weight.
You can find a list of possible crossword clues for ISOBAR below.