cos·mos (kŏzməs, -mŏs′, -mōs′)
1. The universe regarded as an orderly, harmonious whole.
2. An ordered, harmonious whole.
3. Harmony and order as distinct from chaos.
4. pl. cos·mos·es or cosmos Any of various mostly Mexican herbs of the genus Cosmos in the composite family, having radiate flower heads of variously colored flowers and opposite pinnate leaves, especially C. bipinnatus and C. sulphureus, widely cultivated as garden annuals.
[Middle English, from Greek kosmos, order.]
(click for a larger image)cosmos
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.