engine reamer

en·gine ream·er

an engine-mounted spirally bladed instrument, used for enlarging the root canals of teeth.
Farlex Partner Medical Dictionary © Farlex 2012

en·gine ream·er

(enjin rēmĕr)
Engine-mounted spirally bladed instrument, used to enlarge root canals of teeth.
Medical Dictionary for the Dental Professions © Farlex 2012