The ornamental design for an aromadiffuser, as shown.
FIG. 1 is a perspective view of the design for an aroma diffuser;
FIG. 2 is a front view of the design;
FIG. 3 is a rear view of the design;
FIG. 4 is a left side view of the design;
FIG. 5 is a right side view of the design;
FIG. 6 is a top view of the design;
FIG. 7 is a bottom view of the design;
FIG. 8 is a perspective view showing the practical usage thereof; and,
FIG. 9 is a perspective view showing the practical usage thereof.
The broken line showing of vanilla or petals and water line in FIG. 8 and FIG. 9 are for illustrative purposes only and forms no part of the claimed design.