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insidious

Pronunciation: in-sid'e-us

Definition: Treacherous; stealthy; denoting a disease that progresses gradually with inapparent symptoms.

[L. insidiosus, cunning, fr. insidiae (pl.), an ambush]

Further information

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.

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