Is the name used to describe a rectangular group of cells?

Yes, the name used to describe a rectangular group of cells in a spreadsheet or table is called a "range." A range can consist of a single cell or multiple cells selected together, often identified by the cell references of the top-left and bottom-right corners (e.g., A1:B10). Ranges are commonly used for data manipulation, calculations, and formatting in applications like Microsoft Excel or google Sheets.