by-blow

noun

\ ˈbī-ˌblō

plural by-blows

Definition of by-blow

1 : an indirect blow While photographers snapped away, the two men chatted amiably about … the by-blows from Hurricane Esther, even then whipping through New York. — Time

2 dated : a child born to parents who are not married to each other … Aubrey noted that Shakespeare … had bedded down at the Crown Tavern in Oxford; that the innkeeper's wife was a very beautiful and witty woman; and that her poet son boasted of being Shakespeare's by-blow.— S. Schoenbaum … and now, after over twenty years of bachelorhood, Travis has suddenly discovered he has a daughter of seventeen, a by-blow from an earlier case.— Charles Nicol

3 : a secondary or unintended consequence As one of the by-blows of having my microwave books published in London, I have been going there more …— Barbara Kafka … the lunar programme was a child of its time, a by-blow of the Cold War arms race … — Daily Telegraph (London)