Abstract: Disclosed is an improved cutter that finds principal utility in, but is not limited to, lawn mowers of the type in which a cutter blade is rotated about an upright axis by a power source such as an electric motor, internal-combustion engine, etc. The disclosed improvement involves a blade that produces a slicing rather than a shearing action, accomplished by a blade design having diametrically opposed end portions, each sharpened to provide a slicing edge that is directed from a leading edge portion to a trailing edge portion, thus providing a blade of increased efficiency and requiring lower consumption of horsepower. The slicing edges may also be combined with conventional impact cutting edges.