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]
Existing or occurring in the atmosphere. [1913 Webster]
Caused, or operated on, by the atmosphere; as, an atmospheric effect; an atmospheric engine. [1913 Webster]
Dependent on the atmosphere. [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. --