xystum An architectural term. It can refer to a wall, a promenade, an alley, or an open path. It may also refer to an atrium (open space in a building), ambulacrum (walk planted with trees), or parvis (enclosed area) in front of a basilica (Roman public building).
Found on http://www.wordinfo.info/words/index/info/view_unit/3836/


Xystum, an architectural term, refers to a wall, promenade, alley, or open path. It can also refer to an atrium, ambulacrum, or parvis in front of a basilica. The term should not be confused with the ancient Greek architectural term xystus, meaning the covered portico of a gymnasium. ==Sources== ...
Found on http://en.wikipedia.org/wiki/Xystum
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