Fifthly
Pronunciation : Fifth"ly
Part of Speech : adv.
Definition : Defn: In the fifth place; as the fifth in order.
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