phi
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phi
(fī, fē)n.
The 21st letter of the Greek alphabet. See Table at alphabet.
[Late Greek phī, from Greek phei.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
phi
(faɪ)n, pl phis
(Letters of the Alphabet (Foreign)) the 21st letter in the Greek alphabet (Φ, φ), a consonant, transliterated as ph or f
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
phi
(faɪ)n., pl. phis.
the 21st letter of the Greek alphabet (Φ, φ).
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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| Noun | 1. |  phi - the 21st letter of the Greek alphabetGreek alphabet - the alphabet used by ancient Greeks alphabetic character, letter of the alphabet, letter - the conventional characters of the alphabet used to represent speech; "his grandmother taught him his letters" |
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