loose tea
noun [ U ] uk/ˌluːs ˈtiː/ us/ˌluːs ˈtiː/
散茶，散装茶
tea in the form of dried tea leaves that have not been put into teabags (= small paper bags each filled with enough tea leaves to make tea for one person)
She didn't use teabags, but brewed a pot using loose tea. 她没有用茶包，而是用散茶冲泡了一壶。