Meaning of certification mark

certifica'tion mark"

Pronunciation: [key]
  1. a mark that certifies the origin, material, quality, mode of manufacture, accuracy, or other characteristic of a product or service: “UL” is a certification mark for appliances meeting the safety standards of Underwriters Laboratories, Inc.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.