An Etymological Dictionary of Astronomy and Astrophysics
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Having a constant entropy.

→ iso- + → entropy + → -ic.

A → reversible flow in which the value of → entropy remains → constant; i.e. no energy is added to the flow, and no energy losses occur due to friction or dissipative effects.

→ isentropic; → flow.

A → thermodynamic process for which there is no → heat transfer with the surroundings, and no change in → entropy.

→ isentropic; → process.