What is "raisin tree"

Raisin \Rai"sin\ (r[=a]"z'n), n. [F. raisin grape, raisin, L. racemus cluster of grapes or berries; cf. Gr. "ra`x, "rago`s, berry, grape. Cf. Raceme.]

1. A grape, or a bunch of grapes. [Obs.]
   --Cotgrave.

2. A grape dried in the sun or by artificial heat.

   Raisin tree (Bot.), the common red currant bush, whose fruit resembles the small raisins of Corinth called currants. [Eng.]
   --Dr. Prior.