haček definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a mark (ˇ) used over certain consonant letters in the orthography of some languages to indicate a specific sound, or used in certain systems of symbols for representing speech sounds
haček definition by American Heritage Dictionary
A diacritical mark (˘) that resembles an inverted circumflex and is used over certain letters, such as č, to indicate quality of pronunciation.
Origin: Czech háček, diminutive of hák, hook, from Middle High German hāken, from Old High German hāko; see keg- in Indo-European roots.