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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.
trochlear is a noun meaning "either of the two cranial nerves on either side that control the superior oblique muscles of the eyes". It carries one recorded sense.
either of the two cranial nerves on either side that control the superior oblique muscles of the eyes
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 trochlear come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.