Boation
Pronunciation : Bo*a"tion
Part of Speech : n.
Etymology : [L. boatus, fr. boare to roar.]
Definition : Defn: A crying out; a roaring; a bellowing; reverberation. [Obs.] The guns were heard . . . about a hundred Italian miles, in long boations. Derham.
Source : Webster's Unabridged Dictionary, 1913