naphthalene
noun/ˈnæfθəliːn/, /ˈnæpθəliːn/
/ˈnæfθəliːn/, /ˈnæpθəliːn/
[uncountable] (chemistry)- a substance used in mothballs (= used for keeping moths away from clothes) and in industrial processesWord Originearly 19th cent.: from naphtha + -ene, with the insertion of -l- for ease of pronunciation.
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naphthalene