Conversation so far:
what is the meaning of showbread in the bible
Showbread refers to the cakes or loaves of bread which were always present on a specially dedicated table, in the Temple in Jerusalem as an offering to God.
what else is showbread called
An alternative, and more appropriate, translation would be presence bread.
where is showbread mentioned in the Bible
This is the bread eaten by David as mentioned in Matthew 12:4.

Question: where else is it mentioned
Self-contained rewrite: where else is showbread mentioned, besides Matthew 12:4