standard atmosphere

English Thesaurus

1. a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade (noun.quantity)

hypernym	:	pressure unit,
definition	:	a unit measuring force per unit area (noun.quantity)

hyponym	:	s.t.p., stp,
definition	:	standard temperature and pressure (noun.quantity)