quintain
Concise Oxford English Dictionary © 2008 Oxford University Press:
quintain /ˈkwɪntɪn/
▶noun historical a post set up as a mark in tilting with a lance, typically with a pivoted sandbag attached to strike an inexpert tilter.
– origin ME: from OFr. quintaine, perh. based on L. quintana, a street in a Roman camp separating the fifth and sixth maniples, where military exercises were performed (from quintus ‘fifth’).
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