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drop-arch
drop-arch n.
Brit. 
/ˈdrɒpɑːtʃ/
, /ˈdrɒpɑːtʃ/U.S. /ˈdrɑpˌɑrtʃ/
(see quot.)./ˈdrɑpˌɑrtʃ/ΘΚΠ
society > leisure > the arts > visual arts > architecture > arch > [noun] > other types of arch
bowOE
craba1387
cove1511
triumphal arch (arc)a1566
straight arch1663
pointed arch1688
rough arch1693
jack-arch1700
oxi1700
raking arch1711
flat arch1715
scheme-arch1725
counter-arch1726
ox-eye arch1736
surbased dome1763
ogee1800
rising arch1809
sub-arch1811
deaf arch1815
four-centred arch1815
mixed arch1815
Tudor arch1815
camber1823
lancet arch1823
invert1827
platband1828
pier arch1835
ogive1841
scoinson arch1842
segment1845
skew arch1845
drop-arch1848
equilateral arch1848
lancet1848
rear arch1848
straining-arch1848
tierceron1851
shouldered arch1853
archlet1862
segment-arch1887
1848 J. H. Parker Rickman's Styles Archit. Eng. (ed. 5) 50 Drop arches..have a radius shorter than the breadth of the arch.
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as lemmas