Earthworm

from WordNet (r) 3.0 (2006)

earthworm
    n 1: terrestrial worm that burrows into and helps aerate soil;
         often surfaces when the ground is cool or wet; used as bait
         by anglers [syn: {earthworm}, {angleworm}, {fishworm},
         {fishing worm}, {wiggler}, {nightwalker}, {nightcrawler},
         {crawler}, {dew worm}, {red worm}]

from The Collaborative International Dictionary of English v.0.48

Earthworm \Earth"worm`\, n.
   1. (Zo["o]l.) Any worm of the genus {Lumbricus} and allied
      genera, found in damp soil. One of the largest and most
      abundant species in Europe and America is {L. terrestris};
      many others are known; -- called also {angleworm} and
      {dewworm}.
      [1913 Webster]

   2. A mean, sordid person; a niggard. --Norris.
      [1913 Webster]