Pitch is the distance from the crest of one thread to the next. Because the vast majority of screw threadforms are single-start threadforms, their lead and pitch are the same. Single-start means that there is only one ridge wrapped around the cylinder of the screw's body.
Definition of metropolis. 1  1 : the chief or capital city of a country, state, or region. 2  2 : the city or state of origin of a colony (as of ancient Greece) 3  3a : a city regarded as a center of a specified activity an industrial metropolis a cattle metropolisb : a large important city one of Europe's great metropolises.
Metropolis, Illinois, located at Exit 37 on Interstate 24 at the southernmost tip of Illinois, has so much to offer to so many! Metropolis is the official Home of Superman and proudly honors its favorite son with a 15-foot bronze statue of Americaâs Super Hero right in the middle of Superman Square. A statue of actress Noel Neil, posed as Lois Lane, stands just two blocks down the street from Superman Square.