Direction (Built-in Mathematica Symbol)

Direction is an option for Limit that specifies the direction in which the limit is taken.

Directive (Built-in Mathematica Symbol)

Directive[g_1, g_2, ...] represents a single graphics directive composed of the directives g_1, g_2, ....

DirectoryName (Built-in Mathematica Symbol)

DirectoryName["name"] extracts the directory name from the specification for a file.

DotDashed (Built-in Mathematica Symbol)

DotDashed is a graphics directive specifying that lines that follow should be drawn dot-dashed.

Dotted (Built-in Mathematica Symbol)

Dotted is a graphics directive specifying that lines that follow should be drawn dotted.

EdgeIndex (Built-in Mathematica Symbol)

EdgeIndex[g, e] gives the integer index for the edge e in the graph g.

EnterExpressionPacket (Built-in Mathematica Symbol)

EnterExpressionPacket[expr] is a MathLink packet that requests the evaluation of expr.

EnterTextPacket (Built-in Mathematica Symbol)

EnterTextPacket[string] is a MathLink packet that requests the parsing and evaluation of string as an expression.

EvaluatePacket (Built-in Mathematica Symbol)

EvaluatePacket[expr] is a MathLink packet requesting evaluation of expr.

EventHandler (Built-in Mathematica Symbol)

EventHandler[expr, {"event_1" :> action_1, "event_2" :> action_2, ...}] displays as expr, evaluating action_i whenever "event_i" occurs in connection with expr.