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say it: ay-AWR-tuh
aorta is a noun meaning "the large trunk artery that carries blood from the left ventricle of the heart to branch arteries". It carries one recorded sense.
the large trunk artery that carries blood from the left ventricle of the heart to branch arteries
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 aorta come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.