Artificial intelligent assistant

curb-roof

ˈcurb-roof
  [curb n.]
  A roof of which each face has two slopes, the lower one steeper than the upper; a mansard-roof.

1733 F. Price Brit. Carpenter (1753) 18, B is called a kirb roof, and is much in use, on account of its giving so much room withinside. 1820 Tredgold Carpentry (1853) 95 It appears to have been with a view of lessening..height that the Mansard or curb roof was invented. 1879 D. J. Hill Bryant 143 A spacious..mansion..with a curb-roof, antique dormer windows.

Oxford English Dictionary

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