c.1400, from Greek Proteus (see Protean).
Proteus Pro·te·us (prō'tē-əs)
n.
A genus of gram-negative, rod-shaped aerobic bacteria of the family Enterobacteriaceae that includes certain species associated with human enteritis and urinary tract infections.
In classical mythology, a god who served Poseidon. Proteus could change his shape at will.
Note: Someone or something that easily takes on several different forms may be called “protean.”
An extensible language, the core of PARSEC.
["The Design of a Minimal Expandable Computer Language", J.R. Bell, PhD Thesis, CS, Stanford University (Dec 1968)].