phi(redirected from PHI (disambiguation))
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The 21st letter of the Greek alphabet. See Table at alphabet.
[Late Greek phī, from Greek phei.]
n, pl phis
(Letters of the Alphabet (Foreign)) the 21st letter in the Greek alphabet (Φ, φ), a consonant, transliterated as ph or f
n., pl. phis.
the 21st letter of the Greek alphabet (Φ, φ).