protean
1. [ adjective ] taking on different forms
Examples:

"eyes...of that baffling protean gray which is never twice the same"

Related terms: variable
Similar spelling:   protein
  preteen
  proteome
  protamine
  proton
  Prettyman
  proteinase
  protanopic
  protanopia
  pro_tem
  pretend
  pretense
  pretence
  pretender
  pretended