flathead (plural flatheads)

  1. Any fish in the Platycephalidae family.
  2. (US, informal) Alternative form of flathead catfish
  3. (plural only "flatheads") A type of screw or bolt designed to fit in a countersink so that it sits flush with a surface.
  4. (plural only "flatheads", automotive) A type of engine that has the valves placed in the engine block beside the piston, instead of in the cylinder head, as in an overhead valve engine.


flathead (plural flatheads)

  1. One of the Salish people of Washington state and British Columbia.
Proper noun
  1. Their Salishan language.

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