Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
polysynthetic is an adjective meaning "forming derivative or compound words by putting together constituents each of which expresses a single definite meaning". It carries one recorded sense.
forming derivative or compound words by putting together constituents each of which expresses a single definite meaning
Definitions, synonyms and semantic relations for polysynthetic come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.