Late 19th century. From adiabat-, after German Adiabate (noun) adiabatic curve; compare adiabat (adjective) adiabatic. Compare also French adiabate, noun.
Definition of adiabat in US English:
adiabat
noun
Physics
An adiabatic curve or line; = "adiabatic".
Origin
Late 19th century. From adiabat-, after German Adiabate (noun) adiabatic curve; compare adiabat (adjective) adiabatic. Compare also French adiabate, noun.