X

X, n.

(1) Something unknown. As in "Planet X".

(2) Horizontal range reference used incoordinate system based locations .

See: Y , Z .

Also XdY+Z.

Holdover from D&D ® . Used to indicate somerandomized variable .The Y indicates the size ofthe die (a d6 is a standard 6-sided die). The Xis the number of those die to throw. The Z isa constant amount to add to the resulting throw.e.g. 2d4+1 indicates rolling an 4-sided dietwice (summing each roll ), and adding 1 tothe result yielding some random numberbetween 3 (X+Z) and 9 (X*Y+Z).

See: dice , roll .

XP, n. [Comp. of Experience Point(s).]

Also Xp.

Same as Exp .

XY, n.

(1) Why. Shortform used by young mudders .

Same as Y .