Spreading out loosely: an effuse thallus.
v. (ĭ-fyz) ef·fused, ef·fus·ing, ef·fus·es
1. To pour out (a liquid).
2. To radiate; diffuse.
1. To spread or flow out.
2. To ooze forth; exude.
[Latin effūsus, past participle of effundere, to pour out : ex-, ex- + fundere, to pour; see gheu- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 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.