imbecile

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imbecile

Psychol a person of very low intelligence (IQ of 25 to 50), usually capable only of guarding himself against danger and of performing simple mechanical tasks under supervision
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

imbecile

[′im·bə·səl]
(psychology)
A person of middle-grade mental deficiency; the individual's mental age is between 3 and 7 years.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in classic literature ?
In reply to his last question Pierre again explained who Makar Alexeevich was and how just before their arrival that drunken imbecile had seized the loaded pistol which they had not had time to recover from him, and begged the officer to let the deed go unpunished.
Any imbecile that has got an income believes in that.
Again the vacuous, imbecile smile took possession of her features, and her voice, dropping its harshness, resumed the soft, well-modulated tones with which she had first addressed him.
All my anxieties were concentrated on Marian's rescue from the hands of the licensed imbecile who attended her, and who found my advice confirmed from first to last by the physician from London.
On my return to Blackwater Park (with the letter of invitation) I found that the doctor's imbecile treatment of Marian's case had led to the most alarming results.
Glancing round with an imbecile smile, you sniggeringly observe that "it hasn't got much hair has it?" Nobody answers you for a minute, but at last the stately nurse says with much gravity:
The red fire with its gently audible movement seemed like a solemn existence calmly independent of the petty passions, the imbecile desires, the straining after worthless uncertainties, which were daily moving her contempt.
To give wealth to an old man long past the enjoyment of it-ay, imbecile already!
They present the same rosy complexions and straw-colored mustachios, the same plump cheeks, vacant eyes and low forehead; and they utter, with the same stolid gravity, the same imbecile small talk.
He is greatly irritated by the irony of Socrates, but his noisy and imbecile rage only lays him more and more open to the thrusts of his assailant.
Thomas Mugridge was beside himself, a blithering imbecile, so pleased was he at chumming thus with the captain.
In a story published in an Edinburgh newspaper last Saturday, he spoke of spending his teenage years getting involved in protection rackets, before a spell in prison made him feel that being behind bars was for "imbeciles".