caoutchouc/ˈkaʊt͡ʃʊk/EtymologyBorrowed from French caoutchouc, from Spanish caucho, from Quechua kawchu. Doublet of caucho.caoutchouc means latex; natural rubber. Lexicurio rates it Rare gem — a strength score of 83 out of 100.nounLatex; natural rubber.“Many a passer-by thought Miss Arundel was listening to some subject of most touching interest: his Lordship was only detailing the benefit he derived one wet day from his caoutchouc cloak.”