Source : Webster's Revised Unabridged Dictionary (1913)

Pricksong \Prick"song`\ (?; 115), n. [See {Prick}, v. t., 4.]
   Music written, or noted, with dots or points; -- so called
   from the points or dots with which it is noted down. [Obs.]

         He fights as you sing pricksong.         --Shak.