(ɒŋˈkɒmɪtə) n (Surgery) an instrument for measuring the size of body organs
oncometer
on·com·e·ter
(ong-kom'ĕ-tĕr), 1. An instrument for measuring the size and configuration of the kidneys and other organs. 2. The measuring, as distinguished from the recording part of the oncograph. [onco- + G. metron, measure]