doily

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A small ornamental mat, usually of lace or linen.
• noun A small table napkin.

from The Century Dictionary.

• noun An old kind of woolen stuff. Also used attributively.
• noun A small ornamental napkin, often in colors, fringed and embroidered, and brought on the dinner-table on a dessert-plate, with the finger-bowl, etc., arranged upon it: also used for many similar purposes.
• noun Also spelled doyley.

from the GNU version of the Collaborative International Dictionary of English.

• noun obsolete A kind of woolen stuff.
• noun A small napkin, used at table with the fruit, etc.; -- commonly colored and fringed.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A small ornamental piece of lace or linen or paper used to protect a surface from scratches by hard objects such as vases or bowls; or to decorate a plate of food.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a small round piece of linen placed under a dish or bowl