Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
a C clef on the fourth line of a staff, used in notation for the upper range of the cello, bassoon, tenor trombone, etc.
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.
The C clef positioned to indicate that the fourth line from the bottom of a staff represents the pitch of middle C.