additional result, unintended but inevitably produced in performing or producing another thing.
result other than the main product(s) of a commercial procedure, particularly sawdust or woodchips produced in processing lumber. Unlike joint-products, byproducts have reduced value in comparison to the key product(s) and will be discarded or sold in a choice of their particular original state, or after additional handling.
a second and sometimes unforeseen outcome
- an item made during the make of something different
His own literary work, nearly all of which originally appeared in its pages - sermons, stories, travels, poems - was only a byproduct of a busy life.