Medical Dictionary

insidious

adj in·sid·i·ous \in-ˈsid-ē-əs\

Medical Definition of INSIDIOUS

:  developing so gradually as to be well established before becoming apparent <an insidious disease>
in·sid·i·ous·ly adverb

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July 04, 2015
stringent Hear it
rigorous, strict, or severe
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