ar·cu·ate /ˈɑrkjəwət, ˌwet/
  (a.)弓形的
  ar·cu·ate /ˈɑrkjəwət, ˌwet/ 形容詞
  (拉arcuatus)弓形的,弧曲的,弓狀的
  Arc·u·ate Arc·u·a·ted (#), a.  Bent or curved in the form of a bow.  “Arcuate stalks.”
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  arcuate
       adj : forming or resembling an arch; "an arched ceiling" [syn: arced,
              arched, arching, arciform, bowed]