English
leucotome
From leuco- + -tome.
Proto-Indo-European *lewk- ‘white’
Proto-Hellenic *leukós ‘white’
Ancient Greek λευκός ‘white’
English leuco
Proto-Indo-European *temh₁- ‘to cut’
…
Ancient Greek τέμνω ‘to cut, separate’
Ancient Greek τόμος ‘section, roll of papyrus, volume’
Latin tomus ‘section of larger work’
Middle French tome
English tome
Today it means
noun An instrument used to perform a leucotomy.
Language periods are conventional ranges, not dates for this word.
Etymograph / leucotome