| 释义 |
nonagon Geom.|ˈnɒnəgən|
[irreg. f. L. nōn-us ninth, after hexagon. Cf. OF. nongone.]
A figure having nine angles; an enneagon.
1688R. Holme Armoury iii. xvi. (Roxb.) 98/1 An Henneagon, or Enneagon or Nonagon, a fort of nyne corners. a1696Scarburgh Euclid (1705) 174 Of the..Nonagon, Euclide makes no mention. 1817Colebrooke Algebra 93 Next the proof of the side of the nonagon is shown. 1842Gwilt Archit. 1008.
b. Used adj. Nine-angled.
1754Pococke Trav. (Camden) I. 72 They are making a nonagon building..where poultry..are to be kept. |