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]

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

in·sid·i·ous

(in-sid'ē-ŭs)
Treacherous; stealthy; denoting a disease that progresses gradually with inapparent symptoms.
References in periodicals archive ?
can occur with sudden overt clinical symptoms or present insidiously. Here we report a case of silent acute ST-elevation myocardial infarction associated with amphetamine use in a 62-year-old diabetic man.
Even so, it's two other things which made this one of the most insidiously uncomfortable programmes I've ever seen.
The text consists of 14 parts, which alternate running within the limits of the city and walking out from it to, along, beyond and off limits, discovering how insidiously mobile those limits are under Occupation.
What you do begins subtly, even insidiously, to define who you are.
HOSPITAL bosses insist they are not "insidiously" reducing services at St Cross in Rugby after closing a ward to save more than pounds 1million per year.
Indeed, Radin's third album is just what the doctor ordered: a set in which his warm vocal caresses subtle songs which insidiously sneak their way into your life.
(2) Such lesions grow insidiously. In asymptomatic patients, these pearls may be detected 1 to 2 years postoperatively during routine follow-up.
Whether the reluctance in the first place was justified is doubtful: the world's nuclear history has not been error and accident free, but the number of casualties resulting from mineral extraction and, more insidiously, from fossil-fuel combustion far outweighs the scale of any problems from nuclear development.
The difference comes when that adult world is foisted insidiously upon them.
Problems like racism, intolerance, discrimination, extremism are insidiously trying to diffuse into societies like deadly diseases," said Erdogan.