a thick black sweet sticky liquid produced when sugar is refined (= made pure) （制糖时产生的）糖浆，糖蜜 - (North American English) (British English treacle)
this thick black sticky liquid when it is used in cooking （制糖时产生的）糖浆，糖蜜
Word Originmid 16th cent.: from Portuguese melaço, from late Latin mellacium ‘must’, based on mel ‘honey’.