1. A thick, viscous, or coagulated mass or lump, as of blood.
2. A clump, mass, or lump, as of clay.
3. A compact group: a clot of trucks blocking the tunnel's entrance.
v. clot·ted, clot·ting, clots
To form into a clot or clots; coagulate: The blood clotted over the wound.
1. To cause to form into a clot or clots.
2. To fill or cover with or as if with clots.
[Middle English, from Old English clott, lump.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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.