cos·tard /ˈkɑstɚ/
  大蘋果的一種
  Cos·tard n.
  1. An apple, large and round like the head.
     Some [apples] consist more of air than water . . . ; others more of water than wind, as your costards and pomewaters.   --Muffett.
  2. The head; -- used contemptuously.
     Try whether your costard or my bat be the harder.   --Shak.
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