what is the meaning of this spanish expression in the written notes for a choral group with 4 voices : "B.C."

Question

I sing in a choral group as an ALTO singer, we have a spanish song to sing. We've been searching To find the meaning of this expression "B.C." which is written above one whole part of the song with out any explanation or words... We've been consulting with spanish specialists but we have not yet found the answer...
We don't know what we are going to sing on this part.
Can you help me with this?!

I have to add this point that, due to our perceptions this B.C. may not be a form or dynamic or so what...
It is exactly written instead of the lyric line, as an expression,explanation or something like that...
I'm not completely sure, but It's a bit strange ,let's say unconceivable, to assume it as basso continuo...

Answer 1

Basso Continuo. It's Italian. I forgot the exact meaning but it's a technical term.

There you go!
Here's the def'n:
Basso Continuo, also called thoroughbass, system of musical accompaniment that dominated European music of the baroque era (circa 1600-c. 1750). It consisted of a bass melody line, written down by the composer and usually played on a cello, viola da gamba, or bassoon; and improvised harmonies, usually played on a harpsichord, organ, harp, or lute. In most cases, the appropriate chords were indicated by small figures—numbers and symbols—written above the bass notes, hence the almost synonymous term figured bass. The basso continuo emerged about 1600 as part of monody, a radically new kind of song in which complex counterpoint (interweaving of lines) was rejected in favor of an expressive solo vocal melody supported by a bass line and simple harmonies. The basso continuo found its way into nearly every instrumental and vocal genre of the next 150 years, becoming a principal characteristic of baroque music.

Added 01/24/07
Well then, it's a mystery. :-)

Added after 4 hrs same date:
Here's a last thing that I can think of that is sensible: The B. I have no idea, while the C, since it's a choral piece would probably mean "cantada" which means "song" in Spanish. So try to ask ur Spanish friends/experts if ever it will ring a bell regarding a B. word followed by "cantada". Bye now! Ur question is really interesting.