Most earthworms are decomposers feeding on undecayed leaf and other plant matter, others are more geophagous.    From Wordnik.com.  [portland indymedia - features] Reference

(geophagous @ Mar. 11 2009, 6: 47 pm).    From Wordnik.com. Reference

Insulate island (vb.) polycephalic ....... many-headed chirography ....... handwriting geophagous ....... dirt-eating.    From Wordnik.com.  [VERBATIM: The Language Quarterly Vol X No 2] Reference