資料來源 : Webster's Revised Unabridged Dictionary (1913)

Thickhead \Thick"head`\, n.
   1. A thick-headed or stupid person. [Colloq.]

   2. (Zo["o]l.) Any one of several species of Australian
      singing birds of the genus {Pachycephala}. The males of
      some of the species are bright-colored. Some of the
      species are popularly called {thrushes}.