the GNU version of the Collaborative International Dictionary of English
n. One versed in the science of geology.
The Century Dictionary and Cyclopedia
n. One who is versed in the science or engaged in the study of geology; specifically, one employed in the investigation or exposition of the structure of the earth, or any part of it: as, the geologist of an exploring expedition; a state geologist.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a specialist in geology
Word Usage
"And a geologist is not truly a scientist unless he practices science instead of just finding rocks."