a. [ Cf. F. radial. See Radius. ] Of or pertaining to a radius or ray; consisting of, or like, radii or rays; radiated;
Radial symmetry. (Biol.)
‖n.;
. (Mach.) An engine, usually an internal-combustion engine of a certain type (the
radial type) having several cylinders arranged radially like the spokes of a complete wheel. The
semiradial engine has radiating cylinders on only one side of the crank shaft. [ Webster 1913 Suppl. ]
adv. In a radial manner. [ 1913 Webster ]
. (Automobiles) a motor vehicle tire in which the cords run at right angles to the plane of the tire (considered as a disk). [ PJC ]