From The Collaborative International Dictionary of English v.0.48:
Irish \I"rish\, a. [AS. [imac]risc, fr. [imac]ras the Irish. Cf.
Aryan, Erse.]
Of or pertaining to Ireland or to its inhabitants; produced
in Ireland.
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Irish elk. (Zool.) See under Elk.
Irish moss.
(a) (Bot.) Carrageen.
(b) A preparation of the same made into a blanc mange.
Irish poplin. See Poplin.
Irish potato, the ordinary white potato, so called because
it is a favorite article of food in Ireland.
Irish reef, or Irishman's reef (Naut.), the head of a
sail tied up.
Irish stew, meat, potatoes, and onions, cut in small pieces
and stewed.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Irish \I*rish"\, n. sing. & pl.
1. pl. The natives or inhabitants of Ireland, esp. the Celtic
natives or their descendants.
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2. The language of the Irish; also called Irish Gaelic or
the Hiberno-Celtic.
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3. An old game resembling backgammon.
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get one's Irish up to become angry.
[PJC] Irish American