adiabatic

(ăd'ē-ə-băt'ĭk, ā'dī-ə-)
adj.
Of, relating to, or being a reversible thermodynamic process that occurs without gain or loss of heat and without a change in entropy.

[From Greek adiabatos, impassable : a-, not; see a-¹ + diabatos, passable (dia-, dia- + batos, passable , from bainein, to go).]

adiabatically ad'i·a·bat'i·cal·ly adv.

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Occurring without the gain or loss of heat.

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Thermally insulated or self-contained (i.e., without heat entering or leaving the body).



Examples of adiabatic heating and cooling when a piston moves up and down in a cylinder.

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describing any thermodynamic process that occurs with neither gain nor loss of heat between the system and its surroundings.
—adiabatically adv.

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For a list of words related to adiabatic, see:

• Physical Properties and Changes - adiabatic: (adj) designating process in which no energy is transferred between a system and its surroundings
• Chemical Properties and Reactions - adiabatic: (adj) designating a process in which no energy is transferred between a system and its surroundings

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