Algophobia: An abnormal and persistent fear of pain. The fear is excessive, beyond that which is expected under the circumstances, producing an anxiety reaction.
From the Greek “algos” (pain) and “phobos” (fear). Note that an “algometer” is an instrument for measuring pain (it does so by gauging the smallest pressure that produces pain).
- Alice in Wonderland syndrome
Alice in Wonderland syndrome: A syndrome of distorted space, time and body image. The patient with the Alice in Wonderland syndrome has a feeling that their entire body or parts of it have been altered in shape and size. The syndrome is usually associated with visual hallucinations. The majority of patients with the syndrome have […]
- Alien hand syndrome
Alien hand syndrome: The feeling that one’s hand is possessed by a force outside of ones control. The syndrome typically arises after trauma to the brain, after brain surgery or after a stroke or an infection of the brain. A person with the alien hand syndrome can feel sensation in the affected hand but thinks […]
Alienist: French term for a psychologist, a psychiatrist, or another practitioner who cares for the mentally ill.
Alimentary: Concerning food, nourishment, and the organs of digestion. From the Latin alimentum meaning nourishment.
Alkaloid: A member of a large group of chemicals that are made by plants and have nitrogen in them. Many alkaloids possess potent pharmacologic effects. The alkaloids include cocaine, nicotine, strychnine, caffeine, morphine, pilocarpine, atropine, methamphetamine, mescaline, ephedrine, and tryptamine.