a. [ Cf. F. heptagonal. ] Having seven angles or sides. [ 1913 Webster ]
Heptagonal numbers (Arith.),
a. [ Cf. F. hexagonal. ] Having six sides and six angles; six-sided. [ 1913 Webster ]
Hexagonal system. (Crystal.)
adv. In an hexagonal manner. [ 1913 Webster ]
a. [ Cf. F. hexagonal. ] Having six sides and six angles; six-sided. [ 1913 Webster ]
Hexagonal system. (Crystal.)
adv. In an hexagonal manner. [ 1913 Webster ]