protean

Short definition from Wiktionary

Adjective

1. 1
   Exceedingly variable; readily assuming different shapes or forms.
2. 2
   Alternative letter-case form of Protean (of or relating to Proteus).
3. 3
   Of or relating to the god Proteus in Greek mythology.
4. 4
   Of or relating to the irregular Neptunian moon named for Proteus.

Noun

1. 1
   A protein that has been slightly modified by water, dilute acid, or enzymes, but not modified to the extent of a metaprotein.