phi

play
noun \ˈfī\

Definition of phi

  1. :  the 21st letter of the Greek alphabet — see alphabet table

Origin and Etymology of phi

Middle Greek, from Greek phei


First Known Use: 1638


Learn More about phi


Seen and Heard

What made you want to look up phi? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

of, relating to, or resembling a fox

Get Word of the Day daily email!