D'eculassement \D['e]`cu`lasse`ment"\, n. [F.] Also, sometimes,
Anglicized Deculassment \Dec`u*lass"ment\(Ordnance)
An accidental blowing off of, or other serious damage to, the
breechblock of a gun; also, a removal of the breechblock for
the purpose of disabling the gun.
[Webster 1913 Suppl.]