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BNC: 27464 COCA: 28158

octagon

Word family 
Related topics: Shapes, patterns, Maths
oc·ta·gon /ˈɒktəɡən $ ˈɑːktəɡɑːn/ noun [countableC]  
CFa flat shape with eight sides and eight angles 八边形，八角形 →5 see picture at 见图 shape1
—octagonal /ɒkˈtæɡənəl $ ɑːk-/ adjectiveadj
 an octagonal tower
八角形塔
Examples from the Corpus
octagon• An ambulatory round the central octagon joins together the four chapels of the smaller ones.• The big trap in dealing with the Duveen Galleries is the centre octagon.• This main octagon is the central chamber or nave.• The result should be a perfect octagon.• Loops of wire pressed octagons into her face, just below the hairline, imprinting a headdress of chains.• At four corners are smaller octagons, replicas in design of the large one and all very tall.• Here, the old central tower over the crossing was replaced by the unique octagon and lantern.
Origin octagon
(1500-1600) Latin octagonum, from Greek, from okta- “eight” + -gonon “-gon”
oc·ta·gon noun
Chinese
Syllable
Corpus

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