Grotesque, a style of classical ornament, so called, in the 13th century, from its having been discovered amongst the painted decorations found in the excavations made in the baths of Titus and other ancient Roman buildings, the Italian word grotto applying to any subterranean chamber. This light, fantastic style was much in favour during the Renaissance.
Grotesque
Chambers's Encyclopaedia, Volume 5: Friday to Humanitarians, p. 431
Source scan(s): p. 0446