Xyst \Xyst\, Xystus \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.
[1913 Webster]