sectroidn.
/ˈsɛktrɔɪd/ The curved surface of two adjacent groins in a vault.
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ogee1356
voussoir1359
severy1399
orb1500
squinch1500
scutcheon1565
ogive1611
pendant1706
groin1725
groining1742
cross-springer1815
boss1823
tail-piles1837
scoinson shaft1842
sectroid1860
boss-stonea1878
groinery1880
1860 J. Newlands Carpenter & Joiner's Assist. 77 To find the covering of the smaller sectroid BPLOD.
1875 E. H. Knight Pract. Dict. Mech.
This entry has not yet been fully updated (first published 1911; most recently modified version published online December 2021).
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n.1860