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The Collaborative International Dictionary
Pricksong

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.

Wiktionary
pricksong

n. Music written, or noted, with dots or points.