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a·can·thus (ə-kănthəs)
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n. pl. a·can·thus·es or a·can·thi (-thī)
1. Any of various perennial herbs or small shrubs of the genus Acanthus, native to the Mediterranean and having pinnately lobed basal leaves with spiny margins and showy spikes of white or purplish flowers.
2. Architecture A design patterned after the leaves of one of these plants, used especially on the capitals of Corinthian columns.

[New Latin Acanthus, genus name, from Greek akanthos, thorn plant, from akantha, thorn.]

a·canthine (-thĭn, -thīn) adj.
(click for a larger image)
acanthus
top: bear's breeches
Acanthus spinosus
bottom: acanthus pattern on a column's capital
(click for a larger image)
acanthus

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. 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:

    Indo-European Roots

    Semitic Roots

    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.