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isochor
isochor n.
Brit. 
/ˈʌɪsə(ʊ)kɔː/
, /ˈʌɪsə(ʊ)kɔː/U.S. /ˈaɪsəˌkɔr/
[Greek χώρα space] a curve connecting points corresponding to equal volumes, on a diagram denoting relations between pressure and temperature./ˈaɪsəˌkɔr/<
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