In Excel it is called a workbook.
They are spreadsheet files and Excel refers to them as workbooks.
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MS Excel is a spreadsheet program that creates files called workbooks.
Generally it would still be called a spreadsheet, but it could be called a What-if spreadsheet.
The area of the screen where you interact with a spreadsheet is called the spreadsheet workspace or spreadsheet view. It is where you input, view, and manipulate data within the cells of the spreadsheet.
A spreadsheet is sometimes called a worksheet.
It is called a spreadsheet or a worksheet.
It usually is called a spreadsheet. Microsoft Excel calls it a worksheet.
In a spreadsheet a built-in formula is called a function.
One location on a spreadsheet is called a "cell".
.XLS files are standard Microsoft Excel spreadsheet files. .XLT extension is used for the Excel template files. - Neeraj Sharma
It can be called a worksheet. There is a range of actual spreadsheet programs, so people often refer to them directly, like Excel or Quattro or Works or Open Office or Lotus 123, instead of using the term spreadsheet.