lock‧et /ˈlɒkət, ˈlɒkɪt $ ˈlɑː-/ 
 noun [countable][
Date: 1300-1400; 
Language: Old French; 
Origin: locquet, from Middle Dutch loke 'latch']
 a piece of jewellery that you wear around your neck on a chain, with a small metal case in which you can put a picture, a piece of hair etc 
 [TahlilGaran] Dictionary of Contemporary English ▲