BC noun 8adjective 1adverb 1forms 1 noun8 •Initialism of British Columbia: a province of Canada. •Initialism of birth control. •Initialism of backward compatibility.This would be a BC-breaking change. •Initialism of Baja California: a state of Mexico. •Initialism of border collie. •Initialism of borough council. •(US) Initialism of battlecruiser. •Initialism of benzalkonium chloride. adjective1 •Initialism of board-certified. adverb1 •Initialism of Before Christ.The Han Dynasty ruled China from 206 BC to AD 220. formsBCs