Xy"ris(?), n. [L., a kind of Iris, Gr. , fr. a razor.] (Bot.) A genus of endogenous herbs with grassy leaves and small yellow flowers in short, scaly-bracted spikes; yellow-eyed grass. There are about seventeen species in the Atlantic United States.
Xys"tus(?), } n. [L. xystus, Gr. , from to scrape, polish; -- so called from its smooth and polished floor.] (Anc. Arch.) A long and open portico, for athletic exercises, as wrestling, running, etc., for use in winter or in stormy weather.
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