lancet
Concise Oxford English Dictionary © 2008 Oxford University Press:
lancet /ˈlɑːnsɪt/
▶noun a small, broad two-edged surgical knife or blade with a sharp point.
– derivatives
lanceted adjective.
lanceted adjective.
– origin ME (also denoting a small lance): from OFr. lancette, dimin. of lance ‘a lance’.
'lancet' also found in these Oxford entries:

