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atmosphere[atmosphere 词源字典]

atmosphere: [17] Etymologically, atmosphere means ‘ball of vapour’. It was coined as modern Latin atmosphaera from Greek atmós ‘vapour’ (related to áein ‘blow’, ultimate source of English air) and sphaira ‘sphere’. Its original application was not, as we would now understand it, to the envelope of air encompassing the Earth, but to a mass of gas exhaled from and thus surrounding a planet; indeed, in the first record of the word’s use in English, in 1638, it was applied to the Moon, which of course is now known to have no atmosphere. The denotation of the word moved forward with the development of meteorological knowledge.
=> air, sphere[atmosphere etymology, atmosphere origin, 英语词源]