The ornamental design for a trocar, as shown and described.
FIG. 1 is a front perspective view of a trocar according to the present invention.
FIG. 2 is a front view of the trocar of FIG. 1.
FIG. 3 is a rear view of the trocar of FIG. 1.
FIG. 4 is a left side view of the trocar of FIG. 1.
FIG. 5 is a right side view of the trocar of FIG. 1.
FIG. 6 is a top view of the trocar of FIG. 1; and,
FIG. 7 is a bottom view of the trocar of FIG. 1.
The broken lines shown in FIGS. 1 and 4-7 in the middle of the trocar illustrate a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design. The remaining broken lines shown in FIGS. 1-3 illustrate portions of the trocar that form no part of the claimed design.