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The casing or covering of a ship's bottom and sides; the materials for such covering; as, copper sheathing.

A flight of stairs with their supporting framework, casing, balusters, etc. To make a complete staircase is a curious piece of architecture. Sir H. Wotton. Staircase shell. (Zoöl.) (a) Any scalaria, or wentletrap. (b) Any species of Solarium, or perspective shell.

lse or reaction in flowing either outward from a central chamber, inward from an external casing, or from above downward, etc.; -- also called turbine wheel.

ks; especially (Steam Engine), the steam chest; -- called in England valve box, and valve casing. See Steam chest, under Steam. -- Valve face (Mach.), that part of the surface of a valve which comes in contact with the valve seat. -- Valve gear, or Valve motion (Steam Engine), the system of parts by which motion is g…

A tuyère kept cool by water circulating within a casing. It is used for hot blast.

al, applied to an outer door or window so as to cover the joint made by it with the sill, casings, or threshold, in order to exclude rain, snow, cold air, etc.