HTML table td meaning

table data cell

quickest answer: http://www.w3.org/TR/html401/struct/tables.html#edef-TD

(edit) here is the html5 edition: http://www.w3.org/TR/html5/tabular-data.html#the-td-element

It stands for Table Data

It means table data which is basically a cell or column.

Note also that tr stands for table row.