10 letters · 17 points in Scrabble
noun a particular environment or surrounding influence
noun a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade
noun the mass of air surrounding the Earth
originBorrowed from French atmosphère, from New Latin atmosphaera, from Ancient Greek ἀτμός (atmós, “steam”) + σφαῖρα (sphaîra, “sphere”); corresponding to atmo- + -sphere.
Etymology from Wiktionary, CC BY-SA 3.0