Meaning

noun a secondary and sometimes unexpected consequence

noun a product made during the manufacture of something else

originEtymology tree English by- Proto-Indo-European *per-der.? Proto-Indo-European *per-der.? Proto-Indo-European *pér Proto-Indo-European *-o Proto-Indo-European *pró Proto-Indo-European *pro- Proto-Italic *pro- Latin prō- Proto-Indo-European *dewk- Proto-Indo-European *déwkti Proto-Italic *doukō Latin dūcō Latin prōdūcō Latin prōductusder. Middle English product English product English byproduct…

Etymology from Wiktionary, CC BY-SA 3.0