noun, feminine/me.tɔ.ni.mi/plural: métonymies
metonymy (use of a single characteristic or part of an object, concept or phenomenon to identify the entire object, concept, phenomenon or a related object)
Related: métonymique
Learned borrowing from Late Latin metonymia, itself borrowed from Ancient Greek μετωνυμίᾱ (metōnumíā, “change of name”).