Category: A

  • Asymptomatic seropositive

    HIV-positive with out signs or symptoms of HIV disease, AIDS; AIDS-related complex.  

  • Asymbolia

    A condition characterized by the inability to use symbols, as found in mathematics. Inability to comprehend words, gestures, or any type of symbol.  

  • Asylum

    A refuge established in Western Europe in the fifteenth century as a place to confine and provide for the mentally ill were the forerunners of the present-day mental hospitals. An antiquated designation for a facility dedicated to providing care for individuals afflicted with mental illness.  

  • Astronomy

    The science that deals with the celestial bodies; that studies their positions, motions, distances, constitution, relationships, history, and formation.  

  • Astrology

    A pseudoscience that formulates general concepts of the universe based on the assumption that there is a relationship between the movement of the sun, moon, and the planets, and movement of life on earth, astronomy. The forecasting of earthly and human events by means of observing and interpreting the fixed stars, the Sun, the Moon,…

  • Astrocyte

    A star-shaped cell of the connective tissue of the nervous system. Starshaped nerve cell with many branching processes. These processes cover the surfaces of the blood vesselss, neurons, and the pia mater, providing a nonrigid supportive matrix. The matrix helps to regulate the composition of the fluid which surrounds nerve cells (extracellular fluid). A type…

  • Astragalus

    The large bone of the ankle that joins with the two bones of the leg. An old name for the talus (anklebone). Obsolete term for the talus of the ankle.  

  • Astho

    An acronym for Association of State and Territorial Health Officials.  

  • Asthenic reaction

    Neurasthenia.  

  • Astasia-abasia

    The ability to stand or walk without the legs wobbling about and collapsing. There is generally normal control of the legs while sitting or lying, and there is no associated organic pathology. Inability to stand due to muscular incoordination. Lack of motor coordination with inability to stand or walk. An isolated inability to stand or…