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

codlin \cod"lin\, codling \cod"ling\, n. cf. as. codaeppel a
   quince.
   a an apple fit to stew or coddle.
   b an immature apple.
       1913 webster

             a codling when 't is almost an apple. --shak.
       1913 webster

   codling moth zool., a small moth carpocapsa
      pomonella, which in the larval state known as the apple
      worm lives in apples, often doing great damage to the
      crop.
      1913 webster
see also:
codling moth carpocapsa pomonella 

[2] : WordNet (r) 2.0

codling moth
     n : a small gray moth whose larvae live in apples and english
         walnuts syn: codlin moth, carpocapsa pomonella
see also:
codlin moth carpocapsa pomonella 

Moth >> M Words
Moth, definition of term: Moth
moth_pag1.html

Imperial Moth >> I Words
Imperial Moth, definition of term: Imperial Moth
imperial+moth_pag1.html

Gypsy Moth >> G Words
Gypsy Moth, definition of term: Gypsy Moth
gypsy+moth_pag1.html

Geometrid Moth >> G Words
Geometrid Moth, definition of term: Geometrid Moth
geometrid+moth_pag1.html