atm

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade (Freq. 1)
• Syn:
standard atmosphere, atmosphere, standard pressure
• Hypernyms:
pressure unit
• Hyponyms:
STP, s.t.p.