Skewback

noun

Definitions

Noun
  1. 1
    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."

Etymology

From skew + back.

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