Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
praesidium is a noun meaning "a permanent executive committee in socialist countries that has all the powers of some larger legislative body and that acts for it when it is not in session". It carries one recorded sense.
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 praesidium come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.