Aerogun
Pronunciation : A"?r*o*gun`
Part of Speech : n. [A?ro-+ gun.]
Definition : Defn: A cannon capable of being trained at very high angles for use against aircraft.
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