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phi

[ fahy ]
/ faɪ /
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noun, plural phis.
the 21st letter of the Greek alphabet (Φ, φ).
the consonant sound represented by this letter.
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IS and ARE are both forms of which verb?
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use phi in a sentence

British Dictionary definitions for phi

phi
/ (faɪ) /

noun plural phis
the 21st letter in the Greek alphabet (Φ, φ), a consonant, transliterated as ph or f
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for phi (1 of 2)

φ

The Greek letter phi. Entries beginning with this character are alphabetized under phi.

Medical definitions for phi (2 of 2)

phi

n.
The 21st letter of the Greek alphabet.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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