bc

1. Music. basso continuo.
2. blind copy: used as a notation on the carbon copy of a letter or other document sent to a third person without the addressee’s knowledge.Also bcc

1. Scuba Diving. buoyancy compensator.
2. British Columbia, Canada (approved for postal use).

1. Insurance. building and contents.

1. before Christ (used in indicating dates).

1. bills for collection.

1. Bachelor of Chemistry.
2. Bachelor of Commerce.
3. bass clarinet.
4. battery commander.
5. British Columbia.

abbreviation for

1. Also: B.C. (indicating years numbered back from the supposed year of the birth of Christ) before Christin 54 bc Caesar came Compare AD
2. British Columbia

abbreviation of Before Christ, in chronology, attested by 1823. The phrase itself, Before Christ, in dating, with exact years, is in use by 1660s.

An abbreviation used with dates of events that took place before the birth of Jesus. b.c. stands for before Christ. (Compare a.d.; see b.c.e.)