Antonomasia
<B>1.</B> The substitution of a title for a proper name, as in addressing a physician as 'Doctor' or a nurse as 'Nurse.'<BR><B>2.</B> The substitution of a personal name for a noun to designate a member of a group or class, as in calling a geneticist a Mendelist (after Gregor Mendel, who discovered the principles of inheritance).<BR>The word antonomasia is Latin, from the Greek antonomazein, to name instead: anti-, instead of + onomazein, to name (from onoma, name)