Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
taxonomical is an adjective meaning "of or relating to taxonomy". It carries one recorded sense.
of or relating to taxonomy
“taxonomic relations”
“a taxonomic designation”
biology
Definitions, synonyms and semantic relations for taxonomical come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.