cuisse 
(kwĭs) also cuish (kwĭsh)
(kwĭs) also cuish (kwĭsh)n.
Plate armor worn to protect the front of the thigh.
[Middle English quisse, probably back-formation from quisseues, pl. of quisseu, cuisse, from Old French quisseuz, pl. of quissel, from quisse, thigh, from Latin coxa, hip.]