DICT.TW Dictionary Taiwan

 but·ton·wood /ˈbʌtṇˌwʊd/
 釦子樹;其木材

 But·ton·wood n. Bot. The Platanus occidentalis, or American plane tree, a large tree, producing rough balls, from which it is named; -- called also buttonball tree, and, in some parts of the United States, sycamore. The California buttonwood is Platanus racemosa.
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 buttonwood
      n : very large spreading plane tree of eastern and central North
          America to Mexico [syn: American sycamore, American
          plane, Platanus occidentalis]