isobar
noun/ˈaɪsəbɑː(r)/
/ˈaɪsəbɑːr/
(specialist)- a line on a weather map that joins places that have the same air pressure at a particular timeTopics Weatherc2Word Originmid 19th cent.: from Greek isobaros ‘of equal weight’, from isos ‘equal’ + baros ‘weight’.
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isobar