flatheads >> ˈflathɛd
Definition: [noun] an edible tropical marine fish that has a pointed flattened head with the eyes positioned on the top, typically burrowing in the seabed with just the eyes showing.
Definition: [noun] a member of certain North American peoples such as the Chinook, Choctaw, and Salish, named from their supposed practice of flattening their children's heads artificially.
Definition: [noun] (of an engine) having the valves and spark plugs in the cylinder block rather than the cylinder head, which is essentially a flat plate.
Definition: [noun] (of a screw) countersunk.