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phenylethyl alcohol
phenylketonuria
phenylpropanolamine
phenylthiocarbamide
phenytoin
pheromone
phew
PHI
phi
Phi Beta Kappa
phi effect
phi phenomenon
phial
PHIGS
-phil
Phil.
phil-
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phi
phi [ fī ] (plural phis)


noun 
Definition:
 
21st letter of Greek alphabet: the 21st letter of the Greek alphabet, represented in the English alphabet as "ph"
[Mid-20th century. < late Greek, later form of Greek phei]
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