单词 septagon 释义 septagon, a.|sptgn|[ad. late L. septagnus, hybrid f. L. septem seven + Gr. - -angled, -gon.]Heptagonal.1756T. Amory Buncle (1770) I. 215 Making it [basalt] into pentagon, hexagon, and septagon columns.1896Blackw. Mag. Apr. 597 The rock...