n. pl. phal·li (fălī′) or phal·lus·es
a. The penis.
b. The sexually undifferentiated tissue in an embryo that becomes the penis or clitoris.
2. A representation of the erect penis as an embodiment of generative power.
[Late Latin, from Greek phallos; see bhel-2 in the Appendix of Indo-European roots.]
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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.