Dictionary > Insidious

Insidious

Insidious
1. Lying in wait; watching an opportunity to insnare or entrap; deceitful; sly; treacherous; said of persons; as, the insidious foe. The insidious witch.
2. Intended to entrap; characterised by treachery and deceit; as, insidious arts. ”The insidious whisper of the bad angel.
(Science: medicine)” (Hawthorne) insidious disease, a disease existing, without marked symptoms, but ready to become active upon some slight occasion; a disease not appearing to be as bad as it really is.
Synonym: Crafty, wily, artful, sly, designing, guileful, circumventive, treacherous, deceitful, deceptive.
insidiously, Insid”iousness.
Origin: L. Insidiosus, fr. Insidiae an ambush, fr. Insidere to sit in; pref. In- – sedere to sit: cf. F. Insidieux. See Sit.


You will also like...

Chemical composition of the body
Chemical Composition of the Body

The body is comprised of different elements with hydrogen, oxygen, carbon, and nitrogen as the major four. This tutorial..

Lake Wakatipu, New Zealand
New Zealand’s Unique Geographical History

Explore why New Zealand has such unique flora and fauna, and learn why long periods of geographical isolation. This less..

Schematic diagram of bacterial lactose operon
Gene Action – Operon Hypothesis

Learn how the way genes control and determine every aspect of the body. This lesson uses lac operon as an example. ..

..

Body temperature regulation by the hypothalamus
Temperature Regulation in Animals

This tutorial elucidates body temperature regulation. Know the details here to learn how the body sets the body temperat..

"Opabinia regalis"
The Evolutionary Development of Multicellular Organisms

Multicellular organisms evolved. The first ones were likely in the form of sponges. Multicellularity led to the evolutio..

Darwin's Finches - Natural Selection
Darwin and Natural Selection

This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..