doily

noun

a small ornamental mat made of lace or paper with a lace pattern, put on a plate under cakes or other sweet food.

late 17th century: from Doiley or Doyley, the name of a 17th-century 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 century.