skewback
nounEtymology From skew + back.
1
Architecture The side of an arch; the course of masonry on the top of an abutment with a slope for the base of the arch to rest against.
- The avalanche shelter itself consists of a series of heavily reinforced arches, supported by substantial piers on the cliff-side, and on skewbacks cut deep into the rock on the other.1943 March and April, “A British Avalanche Shelter”, in Railway Magazine, page 80: