Chassis :: Chassis (n.) A traversing base frame, or movable railway, along which the carriage of a barbette or casemate gun moves backward and forward. [See Gun carriage.].
Classis :: Classis (n.) A class or order; sort; kind.
Classis :: Classis (n.) An ecclesiastical body or judicatory in certain churches, as the Reformed Dutch. It is intermediate between the consistory and the synod, and corresponds to the presbytery in the Presbyterian church..