a projecting molding on the underside of a vault or ceiling; may be ornamental or structural
a riblike supporting or strengthening part of an animal or plant
any of the 12 pairs of curved arches of bone extending from the spine to or toward the sternum in humans (and similar bones in most vertebrates)
a teasing remark
subject to laughter or ridicule; "The satirists ridiculed the plans for a new opera house"; "The students poked fun at the inexperienced teacher"; "His former students roasted the professor at his 60th birthday"
form vertical ribs by knitting; "A ribbed sweater"