v. co·a·lesced, co·a·lesc·ing, co·a·lesc·es
1. To come or grow together into a single mass: the material that coalesced to form stars.
2. To come together as a recognizable whole or entity: the stories that coalesced as the history of the movement.
3. To come together for a single purpose: The rebel units coalesced into one army to fight the invaders. See Synonyms at mix.
1. To cause to coalesce as a single mass: The atoms were coalesced into a larger molecule.
2. To cause to coalesce as a single whole or entity: The survey responses were coalesced into a single document.
[Latin coalēscere : co-, co- + alēscere, to grow, inchoative of alere, to nourish; see al-2 in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 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.