Columbian Exchange

Short definition from Wiktionary

Proper noun

1. 1
   The widespread transfer of animals, plants, culture, human populations, communicable diseases, technology and ideas between the American and Afro-Eurasian hemispheres in the 15th and 16th centuries, related to European colonization and trade after Christopher Columbus' 1492 voyage.
2. 2
   Alternative letter-case form of Columbian Exchange.