Don't know why the word table wasn't good enough for Microsoft, but SQL Server Reporting Services has a control called a tablix....
But how would I tell you that I have multiple tablix controls?
(I appear not to be the only one with this question)
Tablix does not appear in NGrams's English corpus.
A quick search on Google reveals no dictionaries that contain the word, but the search "tablixes" SQL returns 4,730 results, and the search "tablices" SQL returns 1,160 results.