What does "specie" mean?

Specie: abl. of L. species sort, kind. Used in the phrase in specie, that is, in sort, in kind, in (its own) form. "[The king] expects a return in specie from them" [i. e., kindness for kindness]. Dryden. In specie (Law), in precise or definite form; specifically; according to the exact terms; of the very thing.