Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
a standard pattern of lines, colors, etc. broadcast by a TV station, used to evaluate or adjust individual TV receivers for image quality
Used by arrangement with John Wiley & Sons, Inc.
nounThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A geometric chart transmitted by a television station to assist viewers in adjusting reception.