• Webster's Revised Unabridged Dictionary
    • Déculassement (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.
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Century Dictionary and Cyclopedia
    • n deculassement In gunnery, the unbreeching of a cannon; any serious damage to one of the essential parts of the fermeture or breech-closing mechanism of a breech-loading gun.
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In literature:

Water jacket Culasse a eau; enveloppe d'eau.
"English-French and French-English dictionary of the motor car, cycle, and boat" by Frederick Lucas