Being ambiguous, the word "table" is not used in tcl/tk documents. Instead
- A grid. "grid" is used when referring to layout widgets in table-look style.
- A dictionary. "dictionary" or "matrix" is used when referring to a data structure that can holds tabular data and look up by key value.
- A Multicolumn listbox. "multi-column list" is used when referring to layout multi-dimensional data in tabular way.
Thanks to its ambiguity, the word "table" does not strictly refer to any thing in TCL. Please read the above 3 corresponding links.