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mev·a·lon·ic acid .mev-ə-.län-ik- n a branched dihydroxy acid C6H12O4 that is a precursor of squalene in the biosynthetic pathway forming sterols (as cholesterol)
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mev·a·lon·ic ac·id (mev-ə-lonґik) a carboxylic acid precursor of sterols and other isoprenoids; it accumulates abnormally in mevalonicaciduria.Medical dictionary. 2011.