Английский разговорный словарь (основной) - accidental

ˌæksɪˈdentl adj. & n. --adj. 1 happening by chance, unintentionally, or unexpectedly. 2 not essential to a conception; subsidiary. --n. 1 Mus. a sign indicating a momentary departure from the key signature by raising or lowering a note. 2 something not essential to a conception. øøaccidentally adv. [ME f. LL accidentalis (as ACCIDENT)]