from
The Collaborative International Dictionary of English v.0.48
Gizzard \Giz"zard\, n. [F. g['e]sier, L. gigeria, pl., the
cooked entrails of poultry. Cf. {Gigerium}.]
[1913 Webster]
1. (Anat.) The second, or true, muscular stomach of birds, in
which the food is crushed and ground, after being softened
in the glandular stomach (crop), or lower part of the
esophagus; the gigerium.
[1913 Webster]
2. (Zool.)
(a) A thick muscular stomach found in many invertebrate
animals.
(b) A stomach armed with chitinous or shelly plates or
teeth, as in certain insects and mollusks.
[1913 Webster]
{Gizzard shad} (Zool.), an American herring ({Dorosoma
cepedianum}) resembling the shad, but of little value.
{To fret the gizzard}, to harass; to vex one's self; to
worry. [Low] --Hudibras.
{To stick in one's gizzard}, to be difficult of digestion; to
be offensive. [Low]
[1913 Webster]