A mark ( ¸ ) placed beneath the letter c, as in the spelling of the French word garçon, to indicate that the letter is to be pronounced (s).
[Obsolete Spanish, diminutive of ceda, the letter z (so called because a small z was formerly written after a c, and later below it, to indicate that the normal hard c was to be pronounced as a sibilant, like s or z), from Late Latin zēta, zeta, from Greek; see ZETA.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The American Heritage Dictionary Blog
Check out our blog, updated regularly, for new words and revised definitions, interesting images from the 5th edition, discussions of usage, and more.