Glad you asked. Allow me to share:
Biochemistry . a soft, yellow powder of simple proteinsobtained from corn, used chiefly in the manufacture oftextile fibers, plastics, and paper coatings.
a synthetic fiber produced from this protein.
The third definition, which dictionary.com failed to add, is:
3. A 102 point word in Words with Friends
Kern gets mad when I play words that I don't know. Well, I do know zein, along with plenty of biochem majors! And now I have expanded even more people's vocabulary.