| 释义 |
octagon, n. and a.|ˈɒktəgən|
Also 7 octagone, octogone, 7–8 octogon.
[ad. L. octā-, octōgōn-os adj., a. Gr. ὀκτάγων-ος eight-cornered, f. ὀκτα- octa- + stem of γωνία corner, angle. In F. octogone (1520 in Hatz.-Darm.).]
A. n.
1. Geom. A plane figure having eight angles and eight sides. Hence applied to material objects of octagonal form or section.
1656Blount Glossogr., Octogon. 1660Barrow Euclid iv. xi. Schol., Then will AB be the side of Octagone. 1674tr. Scheffer's Lapland xvi. 84 They [the tents] were octogons somewhat broader towards the bottom. 1757Pococke Trav. (1889) II. 284 A tower at each corner, which..are octagons. 1868Morn. Star 26 Mar., The ceiling of the room is coffered in octagons geometrically arranged.
2. Fortif. A fort having eight bastions.
1706in Phillips. 1727–41in Chambers Cycl.
B. adj. = octagonal.
1679M. Rusden Further Discov. Bees 81 The form is octagon or eight square. 1762–71H. Walpole Vertue's Anecd. Paint. (1786) IV. 134 The octagon buildings at each end. 1774Westm. Mag. II. 316 A..magnificent octogon hall. 1808Scott Marm. v. xxv, Dun-Edin's cross, a pillared stone, Rose on a turret octagon. 1862M. E. Braddon Lady Audley vii. 50 An octagon ante-chamber.
C. Comb., as octagon-faced a. (after double-faced); octagon-stitch, a stitch in crochet-work.
1885F. H. Burnett Theo iv. (1888) 81, I will show you how to do the octagon-stitch. 1892B. Hinton Lord's Return 203 This personage must be octagon-faced, at the least. |