a. An alarm sounded on a bell.
b. A bell used to sound an alarm.
2. A warning; an omen.
[French, alteration of toquassen, from Old French touque-sain, from Old Provençal tocasenh : tocar, to strike (from Vulgar Latin *toccāre) + senh, bell (from Late Latin signum, from Latin, signal; see SIGN).]
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Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.