WordNet records no synonym and no antonym for microtome. It is the only member of its synset, which is common for technical, taxonomic and single-sense vocabulary — there is no other English word that means the same thing. The broader and narrower terms below are the useful relations in that case.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
scientific instrument that cuts thin slices of something for microscopic examination
Synonyms, antonyms and the broader and narrower relations for microtome come from Princeton University’s WordNet. Full sources and licences.