from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Mathematics A function that is both one-to-one and onto.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A function which is both a surjection and an injection.
bi-1 + (in)jection or (pro)jection.(American Heritage® Dictionary of the English Language, Fourth Edition)
This term was introduced by Nicolas Bourbaki in his treatise Éléments de mathématique. (Wiktionary)