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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.
tentorium is a noun meaning "(anatomy) a fold of dura mater that covers the cerebellum and supports the occipital lobes of the cerebrum". It carries one recorded sense.
(anatomy) a fold of dura mater that covers the cerebellum and supports the occipital lobes of the cerebrum
anatomy
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 tentorium come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.