The inmeats, or edible viscera (heart, gizzard, liver, etc.), of poultry.
Webster 1828 Edition
Giblets
GIB'LETS
,
Noun.
The entrails of a goose or other fowl, as the heart, liver, gizzard, &c.; a considerable article in cookery; as, to boil or stew giblets. It is used only in the plural, except in composition; as a giblet-pie.