A division into two or more branches

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1640s, noun of action or state from stem of Medieval Latin furcatus (see furcate (adj.)).

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Furcation \Fur*ca"tion\, n. A branching like a fork.

WordNet Word definitions in WordNet
n. the place where something divides into branches [syn: forking ]

Wiktionary Word definitions in Wiktionary
n. The act or process of furcate; a forking or branch out.