Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
aberration [æbəˈreɪʃən] n аберра́ция, отклоне́ние (от но́рмы)
in a moment of mental aberration в мину́ту помраче́ния рассу́дка
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.