劍橋詞典

tartar noun (SUBSTANCE)

[ 不可數(shù)或單數(shù)名詞：沒有復(fù)數(shù)形式的名詞 ]
a hard substance that forms on the teeth
牙石，牙垢

tartar noun (PERSON)

[ 可數(shù)名詞：有復(fù)數(shù)形式的名詞 ] old-fashioned disapproving
a person who is often angry and unkind
兇暴的人，兇悍的人 返回 tartar