dupionEtymologyFrom French doupion, Italian doppione, from doppio (“double”), Latin duplus. See double, and compare doubloon.dupion means A double cocoon, made by two silkworms. Lexicurio rates it Sui generis — a strength score of 88 out of 100.nounA double cocoon, made by two silkworms.The silk from a double cocoon.