parachor

noun
par·a·chor | \ˈparəˌkȯ(ə)r\
plural -s

Definition of parachor 

: an empirical constant for a liquid that relates the surface tension to the molecular volume and that may be used for a comparison of molecular volumes under conditions such that the liquids have the same surface tension and for determinations of partial structure of compounds by adding values obtained for constituent atoms and structural features

called also molar parachor, molecular parachor

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History and Etymology for parachor

para- entry 1 + Greek chōros space; from its indicating volume

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one that holds something together

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