shellac
noun /ʃəˈlæk/, /ˈʃelæk/
/ʃəˈlæk/, /ˈʃelæk/
[uncountable]- a natural substance used in making varnish to protect surfaces and make them hard
虫胶;紫(胶虫)胶 词源mid 17th cent.: from shell + lac, translating French laque en écailles ‘lac in thin plates’.