perturbative adjective.
[pǝ'tǝ:bǝtɪv, 'pǝ:tǝbeɪtɪv] M17.[Late Latin perturbativus, from Latin perturbat-: see PERTURBATION, -IVE.]Causing or apt to cause perturbation or disturbance; pertaining to or involving (physical or mathematical) perturbation.
■ perturbatively adverb L20. [TahlilGaran] English Dictionary ▲