from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A folded paper construction that can be flexed along its folds to reveal and conceal its faces alternately.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A flat model made from folded strips of paper that can be folded, or flexed, to reveal a number of hidden faces.
Blend of flex + hexagon.(American Heritage® Dictionary of the English Language, Fourth Edition)