naphthalene
noun /ˈnæfθəliːn/, /ˈnæpθəliːn/
/ˈnæfθəliːn/, /ˈnæpθəliːn/
[uncountable] (chemistry- a substance used in mothballs (= used for keeping moths away from clothes) and in industrial processes
萘(用于制作卫生球等) 词源early 19th cent.: from naphtha + -ene, with the insertion of -l- for ease of pronunciation.