hind_leg has definitions from the field of zoology
1
[ noun ] (zoology) the back limb of a quadruped

Used in print

(B. J. D. Meeuse, The Story of Pollination....)

The one sure way to tell victim and villain apart is to examine the hind_legs which in the case of the idler , Psithyrus , lack the pollen baskets - naturally !

*