Delusional parasitosis
Delusional parasitosis: A mistaken belief that one is infested by parasites such as mites, lice, fleas, spiders, worms, or other organisms. See also: Parasitosis, Morgellon’s disease.
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- Demarcation
Demarcation: A setting of limits; a boundary; marking the limits of, delimiting; setting apart, separating. The word “demarcation” is used in medicine mainly in the sense of determining and marking off boundaries. For example, the surface demarcation in respect to damaged tissue can refer to the boundary between the living tissue and the necrotic (dead) […]
- Dementia
Significant loss of intellectual abilities, such as memory capacity, that is severe enough to interfere with social or occupational functioning. Criteria for the diagnosis of dementia include impairment of attention, orientation, memory, judgment, language, motor and spatial skills, and function. By definition, dementia is not due to major depression or schizophrenia. Alzheimer’s disease is the […]
- Dementia, MELAS
Dementia, MELAS: MELAS is the acronym for Mitochondrial Encephalopathy, Lactic Acidosis, and Strokelike episodes. MELAS is a form of dementia. It is caused by mutations in the genetic material (DNA) in the mitochondria. While most of our DNA is in the chromosomes in the cell nucleus, another important cell structure that carries DNA is the […]
- Demonophobia
Demonophobia: An abnormal and persistent fear of evil supernatural beings in persons who believe such beings exist and roam freely to cause harm. Those who suffer from this phobia realize their fear is excessive or irrational. Nevertheless, they become unduly anxious when discussing demons, when venturing alone into woods or a dark house, or when […]
- Demulcent
Demulcent: An agent that forms a soothing, protective film when administered onto a mucous membrane surface. For example, mucilage and oils are demulcents that can relieve irritation of the bowel lining.