What is "portague"

Portague \Por"ta*gue\, n. [See Portuguese.] A Portuguese gold coin formerly current, and variously estimated to be worth from three and one half to four and one half pounds sterling. [Obs.] [Written also portegue and portigue.]

Ten thousand portagues, besides great pearls.
--Marlowe.

n. (context obsolete English) An old Portuguese gold coin.