The lower-case letter φ is used as a symbol for:
The upper-case letter Φ is used as a symbol for:
See also other things named phi, Phi phenomenon.
... makeup of the town is 96.20% White, 0.57% African American, 0.06% Native American, 1.41% Asian, 0.02% Pacific Islander, 0.96% from other races, and 0.78% from two or more ...