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fen·nel (fĕnəl)
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n.
1.
a. A Eurasian plant (Foeniculum vulgare) in the parsley family, having pinnate leaves and clusters of small yellow flowers grouped in umbels, cultivated for its aromatic seeds and edible stalks.
b. The seeds or stalks of this plant.
2. A variety of fennel whose seeds are used as flavoring. Also called sweet fennel.
3. A variety of fennel whose bulbous, celerylike stalks are eaten as a vegetable. Also called finocchio, Florence fennel.
4. See giant fennel.

[Middle English fenel, from Old English fenol, from Latin fēnuculum, variant of faeniculum, diminutive of faenum, fēnum, hay; see dhē(i)- in the Appendix of Indo-European roots.]
(click for a larger image)
fennel
Foeniculum vulgare

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.