gizzard
Concise Oxford English Dictionary © 2008 Oxford University Press:
gizzard /ˈgɪzəd/
▶noun a muscular, thick-walled part of a bird's stomach for grinding food, typically with grit.
■ a muscular stomach of some fish, insects, molluscs, and other invertebrates.
– origin ME giser: from OFr., based on L. gigeria ‘cooked entrails of fowl’.
'gizzard' also found in these Oxford entries:

