Millionairess
Pronunciation : Mil`lion*air"ess
Part of Speech : n.
Definition : Defn: A woman who is a millionaire, or the wife of a millionaire. [Humorous] Holmes.
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