I would barely qualify as a Latin scholar if I knew anything but, if you really wanna wow 'em.

                    Singular      Plural
Nominative   emeritus     emeriti
Genitive       emeriti        emeritorum
Dative          emerito      emeritis
Accusative    emeritum    emeritos
Ablative        emerito      emeritis
Vocative        emerite      emeriti

Course that's just masculine and mixed sex plural. If it's females it goes to first declension.