a small circle of paper or cloth with a pattern of very small holes in it, that you put on a plate under a cake or sandwiches （糕点盘上的）网眼纸垫圈，网眼布垫圈 - (North American English)
a small attractive mat that you put on top of a piece of furniture （置于家具上的）装饰小垫
Word Originlate 17th cent.: from Doiley or Doyley, the name of a 17th-cent. London draper. The word originally denoted a woollen material used for summer wear, said to have been introduced by this draper. The current sense (originally doily napkin) dates from the early 18th cent.