It is from the Latin Ante Christum
In Christus.
Anno Domini is in the year of our Lord. I don't think that B.C. is in Latin. It means before Christ. Before Christ in Latin, is Ante Christus, which is NOT B.C.
Christus in vobis
Ante Christo
The Passion of the Christ
No. Christi means Christ in Latin.
Opus Christi.
Christus inter nos is "Christ among us". Christ in us would be Christus in nobis
It's the Latin of B.C. It means "before Christ".
The x in xmas is the secular world trying to remove Christ from their lives.
crucfix