Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
parasitism is a noun meaning "the relation between two different kinds of organisms in which one receives benefits from the other by causing damage to it (usually not fatal damage)". It carries one recorded sense.
the relation between two different kinds of organisms in which one receives benefits from the other by causing damage to it (usually not fatal damage)
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for parasitism come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.