Sexagenarian
Pronunciation : Sex`a*ge*na"ri*an
Part of Speech : n.
Etymology : [See Sexagenary.]
Definition : Defn: A person who is sixty years old.
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder