Source : Webster's Revised Unabridged Dictionary (1913)

Prill \Prill\, n. [Cf. {Brill}.] (Zo["o]l.)
   The brill.

Prill \Prill\, v. i.
   To flow. [Obs.] --Stow.

Prill \Prill\, n.
   A stream. [Obs.] --Davies (Microcosmos).

Prill \Prill\, n. [Etymol. uncertain.]
   1. (Mining)
      (a) A nugget of virgin metal.
      (b) Ore selected for excellence.

   2. The button of metal from an assay.