My thought is that icon started appearing with the expanded support for partitioned tables, so is this a table that is partitioned or a table that holds partitioned data?
Please check the below screenshot where I have tried to explain the icons used for different types of tables.
Cheers, Alan -- Alan Barrington-Hughes Software Architect Quality & Regulatory Development Office: 704.816.5655 | Main: 704.357.0022 alan_barrington-hughes@premierinc.com | Premier, Inc. (NASDAQ: PINC) Team Award Winner