cock ‧ le /ˈkɒk ə l $ ˈkɑː-/ BrE AmE noun [countable]
[ Date: 1300-1400 ; Language: French ; Origin: coquille 'shell' , from Latin conchylia , from Greek , from konche ; ⇨ ↑ conch ]
1 . a common European ↑ shellfish that is used for food
2 . warm the cockles of sb’s heart especially British English to make someone feel happy and full of good feelings towards other people:
Seeing her new baby just warms the cockles of your heart.