[App. a corruption of Ir. fiorthán long coarse grass.] A species of grass (Agrostis stolonifera or alba). Also fiorin-grass.

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1809.  W. Richardson, in Farmers’ Mag., X. Dec., 503. Facts and Observations relative to the Variety of Irish Grass called FIORIN.

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1812.  Examiner, 7 Sept., 563/2. The wheat has been fairly eaten out by the couch and fiorin grass.

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1856.  W. Allingham, The Mowers, in Athenæum, 26 July, 931/1.

        The clover and the fiorin deep,
  The grass of silvery feather,—
A scythe-sweep, and a scythe-sweep,
  We mow the dale together.

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1866.  Evening Star, 24 March. The fiorin grass, which some farmers anathematise as a weed.

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