Noun
A secondary or additional product; something produced, as in the course of a manufacture, in addition to the principal product.
Source: Webster's dictionaryby product
Happiness is not a goal; it is a by-product. Eleanor Roosevelt
Freedom is the by-product of economic surplus. Aneurin Bevan
The by-product is sometimes more valuable than the product. Havelock Ellis
Happiness is not achieved by the conscious pursuit of happiness; it is generally the by-product of other activities. Aldous Huxley
Self-acceptance has been a blessed by-product of middle age. Candice Bergen
Aesthetic value is often the by-product of the artist striving to do something else. Evelyn Waugh