Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
chalcedon is a noun meaning "a former town on the Bosporus (now part of Istanbul); site of the Council of Chalcedon". It carries 2 recorded senses.
the fourth ecumenical council in 451 which defined the two natures (human and divine) of Christ
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 chalcedon come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.