The Collaborative International Dictionary of English v.0.48:

Prestimony \Pres"ti*mo*ny\, n. [LL. praestimonium, fr. L.
   praestare to furnish, supply: cf. F. prestimonie. See
   Prest, n.] (Canon Law)
   A fund for the support of a priest, without the title of a
   benefice. The patron in the collator.
   [1913 Webster]