xystus noun. ['zɪstǝs] Pl. xysti ['zɪstʌɪ]. Also Anglicized as xyst. M17.
[Latin from Greek xustos smooth, from xuein scrape.]
Classical Antiquities. A long covered portico or court used by ancient Greek athletes for exercises. Also, an open colonnade or terrace walk planted with trees and used by the Romans for recreation and conversation.

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