hex·ag·o·nal /hɛkˈsægənḷ/
  (a.)六角形的,六邊的,底面為六角的
  Hex·ag·o·nal a.  Having six sides and six angles; six-sided.
  Hexagonal system. Crystal. See under Crystallization.
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  hexagonal
       adj : having six sides or divided into hexagons [syn: hexangular]