D

data block or region
A set of cells that contain data of some sort and which are surrounded by blank cells on all sides.
Chart with data labelsdata labels
Words or numbers that are near a data point on a chart to explain it
data point
A single value on a chart, represented by a dot, bar, area, or pie wedge.
 
Decrease Decimal
A button on the toolbar which changes a number's format to show one fewer digits to the right of the decimal point.