[1] : The Collaborative International Dictionary of English v.0.48

gizzard \giz"zard\, n. f. g'esier, 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
see also:
gigerium gizzard shad dorosoma cepedianum to fret the gizzard to stick in one's gizzard 

Gizzard >> G Words
Gizzard, definition of term: Gizzard
gizzard_pag1.html

Fret >> F Words
Fret, definition of term: Fret
fret_pag1.html

Gizzard Shad >> G Words
Gizzard Shad, definition of term: Gizzard Shad
gizzard+shad_pag1.html

Fret Saw >> F Words
Fret Saw, definition of term: Fret Saw
fret+saw_pag1.html