Roll"ing (?), a.
Rotating on an axis, or moving along a surface by rotation; turning over and over as if on an axis or a pivot; as, a rolling wheel or ball.
Moving on wheels or rollers, or as if on wheels or rollers; as, a rolling chair.
Having gradual, rounded undulations of surface; as, a rolling country; rolling land.
Rolling bridge. See the Note under Drawbridge. -- Rolling circle of a paddle wheel, the circle described by the point whose velocity equals the velocity of the ship. J. Bourne. -- Rolling fire Mil., a discharge of firearms by soldiers in line, in quick succession, and in the order in which they stand. -- Rolling friction, that resistance to motion experienced by one body rolling upon another which arises from the roughness or other quality of the surfaces in contact. -- Rolling mill, a mill furnished with heavy rolls, between which heated metal is passed, to form it into sheets, rails, etc. -- Rolling press. (a) A machine for calendering cloth by pressure between revolving rollers. (b) A printing press with a roller, used in copperplate printing. -- Rolling stock, ∨ Rolling plant, the locomotives and vehicles of a railway. -- Rolling tackle Naut., tackle used to steady the yards when the ship rolls heavily. R. H. Dana, Jr.
© Webster 1913.