say it: em-ah-RAHY
mri is a noun meaning "the use of nuclear magnetic resonance of protons to produce proton density images". It carries one recorded sense.
the use of nuclear magnetic resonance of protons to produce proton density images
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 mri 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.