curtana
Concise Oxford English Dictionary © 2008 Oxford University Press:
curtana /kəːˈtɑːnə, -ˈteɪnə/
▶noun the unpointed sword carried in front of English sovereigns at their coronation to represent mercy.
– origin ME: from Anglo-Latin curtana (spatha) ‘shortened (sword)’, from OFr. cortain, the name of the sword belonging to Charlemagne's paladin Roland (the point of which was damaged), from cort ‘short’, from L. curtus ‘cut short’.
'curtana' also found in these Oxford entries:

