nomenclature UK /nə(ʊ)ˈmɛŋ.klət͡ʃə/US /ˈnoʊmənˌkleɪt͡ʃɚ/ noun3 •A set of names or terms.I'll try to educate ya / Gonna familiarize you with the nomenclature — 2014 •A set of rules used for forming the names or terms in a particular field of arts or sciences. •(no longer used) A name. formsnomenclatures