free energy is a noun meaning "(physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs". It carries one recorded sense.
(physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs
“energy can take a wide variety of forms”
physics
Definitions, synonyms and semantic relations for free energy come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.