Incidentally

наречие 1) случайно 2) кстати, между прочим; в этой связи Например: Incidentally, I wanted to have a word with you about your academic career. — Кстати, я хотел поговорить с тобой по поводу твоей научной карьеры.

Большой англо-русский словарь

Incidentally

adverb 1. in an incidental manner; not intentionally Example: the arrant nonsense of some of his statements is incidentally hilarious — John Lahr 2. by way of interjection or digression; by the way Example: fortunate in having a good teacher…—still living, incidentally — John Fischer

Merriam-Webster's Collegiate Dictionary
incidentally
incidental
incidental amplitude modulation
incidental cost
incidental emitter
incidental expenses
incidental fm
incidental frequency modulation
incidental material
incidental music
incidental nonlinearity
incidental parameter
incidental phase modulation
incidental result
incidental time
seller's incidental damages