noun.
Any of various terrestrial annelid worms of the class Oligochaeta, especially those of the family Lumbricidae, that burrow into and help aerate and enrich soil.
The Century Dictionary and Cyclopedia
noun.
The common name of the worms of the family Lumbricidæ (which see), and especially of the genus Lumbricus, of which there are several species, one of the best-known being L. terrestris.
noun.
Figuratively, a mean, sordid wretch.
the GNU version of the Collaborative International Dictionary of English
noun.
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.