ge·o·fact 
(jēō-făkt′)
(jēō-făkt′)n.
A natural rock fragment having the appearance of an artifact made by humans.
[From GEO-, on the model of ARTIFACT.]
- disorganized schizophrenia
- disorient
- disorientation
- disown
- disparage
- disparagement
- disparager
- disparagingly
- disparate
- disparately
- disparateness
- disparity
- disparlure
- dispassion
- dispassionate
- dispassionately
- dispassionateness
- dispatch
- dispatcher
- dispel
- dispensability
- dispensable
- dispensableness
- dispensary
- dispensation