A unit of pressure the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade
Else clues• Air
• Ambience
• Envelope surrounding the earth through which solar radiation passes and is reflected
• Gaseous envelope surrounding Earth
• Vibe
• A distinctive but intangible quality surrounding a person or thing
• A particular environment or surrounding influence
• The mass of air surrounding the Earth
• The weather or climate at some place
• The envelope of gases surrounding any celestial body