a squeezer with a conical ridged center that is used for squeezing juice from citrus fruit
source: WordNet 3.0
a drill that is used to shape or enlarge holes
source: WordNet 3.0
One who, or that which, reams; specifically, an instrument with cutting or scraping edges, used, with a twisting motion, for enlarging a round hole, as the bore of a cannon, etc.
