Webster's 1828 Dictionary
DUPION
n.A double cocoon, formed by two or more silk-worms.
Webster's 1913 Dictionary
DUPION
Du "pi *on, n. Etym: [F. doupion, It. doppione, fr. doppio double, L.duplus. See Double, and cf. Doubloon. ]
Defn: A double cocoon, made by two silkworms.
New American Oxford Dictionary
dupion
du pi on |ˈdo͞opēˌän ˈdupiɑn |(also dupioni |ˌdo͞opēˈōnē | or silk dupion ) ▶noun a rough slubbed silk fabric woven from the threads of double cocoons. • an imitation of this with other fibers. ORIGIN early 19th cent. (in the sense ‘double cocoon ’): from French doupion, from Italian doppione, from doppio ‘double. ’
Oxford Dictionary
dupion
dupion |ˈdjuːpɪən |(also silk dupion ) ▶noun [ mass noun ] a rough slubbed silk fabric woven from the threads of double cocoons. • an imitation of dupion made with other fibres. ORIGIN early 19th cent. (in the sense ‘double cocoon ’): from French doupion, from Italian doppione, from doppio ‘double ’.