insidious


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insidious

 [in-sid´e-us]
coming on stealthily; of gradual and subtle development.

in·sid·i·ous

(in-sid'ē-ŭs),
Treacherous; stealthy; denoting a disease that progresses gradually with inapparent symptoms.
[L. insidiosus, cunning, fr. insidiae (pl.), an ambush]

insidious

/in·sid·i·ous/ (-sid´e-us) coming on stealthily; of gradual and subtle development.

insidious

[insid′ē·əs]
Etymology: L, insidiosus, cunning
describing a development that is gradual, subtle, or imperceptible. Certain chronic diseases, such as glaucoma, can develop insidiously with symptoms that are not detected by the patient until the disorder is established. Compare acute.

in·sid·i·ous

(in-sid'ē-ŭs)
Treacherous; stealthy; denoting a disease that progresses gradually with inapparent symptoms.

insidious

Of disease, occurring or progressing in an imperceptible manner so as to reach a harmful stage before being suspected.

Insidious

Developing in a stealthy or gradual manner. Sydenham's chorea may have an insidious onset.
Mentioned in: Sydenham's Chorea

insidious

gradual disease progression, showing few signs or symptoms

in·sid·i·ous

(in-sid'ē-ŭs)
Treacherous; stealthy; denoting a disease that progresses gradually with inapparent symptoms.

insidious

coming on stealthily; a gradual and subtle development.
References in classic literature ?
The conditions fostering the growth of that supreme, alive excellence, as well in work as in play, ought to be preserved with a most careful regard lest the industry or the game should perish of an insidious and inward decay.
I answer no such irrelevant and insidious questions; though were I to answer all that you could put in the course of an hour, you would never be able to prove that it was not Thornton Lacey--for such it certainly was.
It had sprung from the perch and was circling slowly round the Queen's Hall with a dry, leathery flapping of its ten-foot wings, while a putrid and insidious odor pervaded the room.
And Crawshay was capable of it - of perceiving the insidious revenge - of taking it without compunction or remorse.
Weeks had listened politely, with smiling modesty, till Hayward finished; then he asked one or two insidious questions, so innocent in appearance that Hayward, not seeing into what a quandary they led him, answered blandly; Weeks made a courteous objection, then a correction of fact, after that a quotation from some little known Latin commentator, then a reference to a German authority; and the fact was disclosed that he was a scholar.
The charm, the insidious magic in which he had luxuriated, were suddenly gone; his feeling had become one of friendly respect, and to his great pleasure he found himself thinking spontaneously of the relief of finding himself alone in his room that night.
Often they would do their lessons in the open air; which I had nothing to say against: except that I frequently caught cold by sitting on the damp grass, or from exposure to the evening dew, or some insidious draught, which seemed to have no injurious effect on them.
They cooked their meat before they ate it and they shunned many articles of food as unclean that Tarzan had eaten with gusto all his life and so insidious is the virus of hypocrisy that even the stalwart ape-man hesitated to give rein to his natural longings before them.
Von Horn, too, had let them know the identity of their creator, and thus implanted in their malformed brains the insidious poison of revenge.
Or did there lurk in her the insidious unhealthfulness of unwomanliness?
Again that insidious suggestion of peace, and his ship a raging furnace beneath his feet
And right here was John Barleycorn getting me in a more insidious though no less deadly way than when he nearly sent me out with the tide.