1610s, "the point at which something splits in two," noun of action from bifurcate (v.). Meaning "a division into two forks" is from 1640s.
bifocal
bifocals
bifold
bifoliate
bifurcate
bifurcation
big
Big Apple
big bang
Big Ben
Big Brother
)window.location='https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=byronic106@yahoo.com&lc=US&item_name=Donation+to +Help+Keep+Etymonline+Free+and+Open&no_note=0&cn=&curency_code=USD&bn=PP-DonationsBF:btn_donateCC_LG.gif:NonHosted'){kind=link}