Definition of hypochondriasis
: excessive concern about one's health especially when accompanied by imagined physical ailments
specifically
: illness anxiety disorder
The diagnostic criteria for hypochondriasis also require that the patient's concern about illness persist for at least six months and cause clinically significant distress or functional impairment. — Arthur J. Barsky Hypochondria, known as hypochondriasis in medical terminology, is generally defined as abnormal preoccupation with one's health and a fear of having or getting a disease despite physical evidence to the contrary. — Jean Marbella
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Merriam-Webster unabridged
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Time Traveler for hypochondriasis
The first known use of hypochondriasis was in 1722
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