Pie·gan 
(pē-găn)
(pē-găn)n. pl. Piegan or Pie·gans
A member of the southernmost tribe of the Blackfoot confederacy, inhabiting northwest Montana and southern Alberta.
- phot-
- photic
- photo
- photo-
- photoactive
- photoactivity
- photoaged
- photoaging
- photoautotroph
- photoautotrophic
- photoautotrophically
- photobiologic
- photobiological
- photobiology
- photobomb
- photocell
- photochemical
- photochemically
- photochemical smog
- photochemistry
- photochromatic
- photochromism
- photocoagulate
- photocoagulation
- photocompose