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The word 'serration' has several meanings:

★ A serrated edge is one with a running pattern of regular, triangular teeth. Most kinds of saw have serrated edges on their cutting blades as do many knives.

★ Animal teeth that are serrated have saw-like projections running along one or more edges, usually to assist with cutting through flesh.

★ A serration in vexillology is a flag pattern of two colors joined at a serrated edge. The national flags of Bahrain and Qatar, for example, are serrations.

★ A serration in aeronautics is an airframe shape commonly seen in stealth aircraft, such as the USAF B-2 stealth bomber.

★ A serration profile is a serration extruded into a three-dimensional shape, such as the screw thread on cross section of a screw.

★ In plant identification, serrate means toothed. A doubly serrate margin for instance, would be a leaf margin with toothed teeth.

★ The Serrate radar detector was an Allied Lichtenstein radar detection and homing device, used in night fighter to track down German night fighters equipped with Lichtenstein radar during World War II.