Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
crystallised is an adjective meaning "having become fixed and definite in form". It carries one recorded sense.
having become fixed and definite in form
“distinguish between crystallized and uncrystallized opinion”
Definitions, synonyms and semantic relations for crystallised come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. .