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atmospheric 音標拼音: [ ,ætməsf'ɛrɪk] a. 大氣層的,有某種氣氛的 大氣層的,有某種氣氛的 atmospheric adj 1: relating to or located in the atmosphere; " atmospheric tests" [ synonym: { atmospheric}, { atmospherical}] Atmospheric \ At` mos* pher" ic\, Atmospherical \ At` mos* pher" ic* al\, a. [ Cf. F. atmosph[' e] rique.] 1. Of or pertaining to the atmosphere; of the nature of, or resembling, the atmosphere; as, atmospheric air; the atmospheric envelope of the earth. [ 1913 Webster] 2. Existing or occurring in the atmosphere. [ 1913 Webster] The lower atmospheric current. -- Darwin. [ 1913 Webster] 3. Caused, or operated on, by the atmosphere; as, an atmospheric effect; an atmospheric engine. [ 1913 Webster] 4. Dependent on the atmosphere. [ R.] [ 1913 Webster] In am so atmospherical a creature. -- Pope. [ 1913 Webster] { Atmospheric engine}, a steam engine whose piston descends by the pressure of the atmosphere, when the steam which raised it is condensed within the cylinder. -- Tomlinson. { Atmospheric line} ( Steam Engin.), the equilibrium line of an indicator card. Steam is expanded " down to the atmosphere" when its pressure is equal to that of the atmosphere. ( See { Indicator card}.) { Atmospheric pressure}, the pressure exerted by the atmosphere, not merely downwards, but in every direction. In amounts to about 14. 7 Ibs. on each square inch. { Atmospheric railway}, one in which pneumatic power, obtained from compressed air or the creation of a vacuum, is the propelling force. { Atmospheric tides}. See under { Tide}. [ 1913 Webster]
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