The Collaborative International Dictionary
Costotome
Costotome \Cos"to*tome\ (k?s"t?-t?m), n. [Costa + Gr. ???? to
cut.]
An instrument (chisel or shears) to cut the ribs and open the
thoracic cavity, in post-mortem examinations and dissections.
--Knight.
Wiktionary
costotome
n. An instrument to cut the ribs and open the thoracic cavity in post mortems.