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isobar in British English
(ˈaɪsəʊˌbɑː)
noun
1.
a line on a map connecting places of equal atmospheric pressure, usually reduced to sea level for purposes of comparison, at a given time or period
2. physics
any of two or more atoms that have the same mass number but different atomic numbers
tin-115 and indium-115 are isobars
Compare isotope Derived forms
isobarism (ˈisobarˌism) noun
Word origin
C19: from Greek isobarēs of equal weight, from iso- + baros weightisobar in American English
(ˈaɪsoʊˌbɑr; ˈaɪsəˌbɑr)
noun
1.
a line on a map connecting points having equal barometric pressure at a given reference altitude, commonly sea level, over a given period or at a given time
2.
any atom that has the same atomic weight (or mass number) as another atom but a different atomic number, as carbon-14 andnitrogen-14
Derived forms
isobaric (ˌisoˈbaric) (ˈaɪsoʊˈbærɪk; ˈaɪsəˈbærɪk) adjective
Word origin
< iso- + Gr baros, weightImage ofisobar
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