adj.
Pronunciation: ˌ a-d ē - ə - ' ba-tik, ˌ ā - ˌ d ī - ə -
Function: adjective
Etymology: Greek adiabatos impassable, from a- + diabatos passable, from diabainein to go across, from dia- + bainein to go ― more at COME
Date: 1859
: occurring without loss or gain of heat < adiabatic expansion of a gas>
– adi · a · bat · i · cal · ly \ -ti-k( ə -)l ē \ adverb