An Etymological Dictionary of Astronomy and Astrophysics

A → thermodynamic process that occurs without → loss or → gain of → heat.

See also:

→ adiabatic change, → adiabatic index, → adiabatic initial conditions, → adiabatic phase, → adiabatic process, → adiabatic shock, → adiabatic temperature gradient, → superadiabatic temperature gradient.

Etymology (EN): From Gk. adiabatos “impassable,” from a- “not” + diabatos “passable,” from diabainein “to go across,” from dia- " through" + bainein “to go.”

Etymology (PE): Bidarrow from bi- “not; without” + darrow “way out,” from dar “out” + row “to go, going,” from raftan “to go.”