Source : Webster's Revised Unabridged Dictionary (1913)

Fiorin \Fi"o*rin\, n. [Cf. Ir. fiothran a sort of grass.] (Bot.)
   A species of creeping bent grass ({Agrostis alba}); -- called
   also {fiorin grass}.

Source : WordNet®

Agrostis alba
     n : slender European grass of shady places; grown also in
         northeastern America and temperate Asia [syn: {wood
         meadowgrass}, {Poa nemoralis}]