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Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
parathyroid is a noun meaning "any one of four endocrine glands situated above or within the thyroid gland". It carries one recorded sense.
any one of four endocrine glands situated above or within the thyroid gland
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 parathyroid come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.