sheathing

Sheath"ing, p. pr. & a. Defn: from Sheathe. Inclosing with a sheath; as, the sheathing leaves of grasses; the sheathing stipules of many polygonaceous plants. Sheath"ing, n. Defn: That which sheathes. Specifically: (a) The casing or covering of a ship's bottom and sides; the materials for such covering; as, copper sheathing. (b) (Arch.) The first covering of boards on the outside wall of a frame house or on a timber roof; also, the material used for covering; ceiling boards in general.

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