Catshead

A catshead (alternatively cat's head or cats head) is an architectural feature commonly found on multi-storied mills, agricultural buildings, and factories, composed of a small extension protruding from the gable end of a larger roof.

A grist mill with a single main roof and catsheads at each end vaguely resembles a cat's head in sillohuette, with the catsheads forming the "ears" of the imaginary feline; this may be the origin of the name.