A variant spelling or possible plural form of cuisse; leg armor pieces protecting the thighs in medieval combat.
Possibly a variant spelling of cuisse with a different plural marker, or a Middle English/Old French variant spelling reflecting regional pronunciation patterns in medieval Europe.
Medieval French had multiple ways to pluralize and spell the same word—cuissen vs cuisses vs cuisses all meant the same armor, but which version got written down depended on the scribe's training!
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