Crossword clue: a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade

The most common answer is atm (3 letters).

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

atm 3 letters wn-def

a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade