Cul-de-four

Definitions

  • Chambers's Twentieth Century Dictionary
    • n Cul-de-four kōō-de-foor (archit.) a sort of low spherical vault, oven-like
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Etymology

Chambers's Twentieth Century Dictionary
Fr. cul, bottom—L. culus; Fr. four, furnace, lampe, lamp, sac, sack.

Usage

In literature:

The choir is in effect a cul-de-four, and is lighted by five windows placed rather high up.
"The Cathedrals and Churches of the Rhine" by Francis Miltoun
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