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Drugs and diseases reference index

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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «G»:

  1. Galton, Sir Francis Galton, Sir Francis
    Galton, Sir Francis: English advocate of eugenics, the idea of improving the physical and mental makeup of the human species by selective parenthood. Galton coined the word "eugenics" to denote scientific endeavors to increase the proportion of persons with better than average genetic endowment th...
  2. Gamete Gamete
    Gamete: The sperm or the egg. Each human gamete normally has 23 chromosomes, the haploid number of chromosomes, half the number of chromosomes contained in most types of cells in the body....
  3. Gamete intrafallopian transfer (GIFT) Gamete intrafallopian transfer (GIFT)
    Gamete intrafallopian transfer (GIFT): A technique in which the male and female germ cells required to begin formation of a human embryo are injected into a woman's fallopian tubes of the female for fertilization. This technique is one of the methods doctors use to overcome infertility, the inab...
  4. Gametic Gametic
    Gametic: Pertaining to the gamete (the sperm or eggs)....
  5. Gametic selection Gametic selection
    Gametic selection: Preferential selection of gametes (germ cells -- sperm or eggs). Gametic selection is a mechanism of transmission distortion....
  6. Gametogenesis Gametogenesis
    Gametogenesis: The development and production of the male and female germ cells required to form a new individual. The male and female germ cells are called gametes. The gametes in human males are produced by the testes, two globe-shaped reproductive organs just below the penis. Male gametes are wh...
  7. Gametophobia Gametophobia
    Gametophobia: An abnormal and persistent fear of being married. Sufferers of gametophobia experience undue anxiety even though they may rationally realize that the married state itself poses no threat to them. They may fear the challenge of living with another person and the responsibility of reari...
  8. Gamma globulin Gamma globulin
    Take the Quiz: Chronic Fatigue Syndrome Understand the Causes of Fatigue Slideshow Good, Bad Exercises for Low Back Pain Slideshow ...
  9. Gamma hydroxybutyrate (GHB) Gamma hydroxybutyrate (GHB)
    Gamma hydroxybutyrate (GHB): Known in Europe as Gamma-OH, gamma hydroxybutyrate is a colorless and odorless drug used illicitly for "recreational" purposes and for "date rape." GBH is a central nervous system depressant. It tends therefore to increase sociability and function as something of a trans...
  10. Gamma knife Gamma knife
    Gamma knife: A type of radiosurgery (radiation therapy) machine that acts by focusing low-dosage gamma radiation from many sources on a precise target. Areas adjacent to the target receive only slight doses of radiation, while the target gets the full intensity. The gamma knife may be used to treat...
  11. Gamma linolenic acid Gamma linolenic acid
    Gamma linolenic acid: See: Gamma-linolenic acid....
  12. Gamma ray Gamma ray
    Gamma ray: High-energy electromagnetic radiation emitted by certain radionuclides when their nuclei transition from a higher to a lower energy state. Gamma rays have high energy and a short wave length. All gamma rays emitted from a given isotope have the same energy, a characteristic that enables s...
  13. Gamma-OH Gamma-OH
    Gamma-OH:A European name for gamma hydroxybutyrate (GHB), a colorless and odorless drug used illicitly for "recreational" purposes and for "date rape." GBH is a central nervous system depressant. It tends therefore to increase sociability and function as something of a transient antidepressant. Some...
  14. Ganglia, basal Ganglia, basal
    Ganglia, basal: A region located at the base of the brain composed of 4 clusters of neurons, or nerve cells. This area of the brain is responsible for body movement and coordination. The groups of neurons most prominently and consistently affected in Huntington disease -- the pallidum and striatum...
  15. Ganglion Ganglion
    Ganglion: The celebrated 2nd century Greek physician Galen ((c. 130-201 A.D.) who lived and worked in Rome first used the word ganglion to denote a nerve complex. Ganglion still is used to refer to an aggregation of nerve cell bodies. Another use of the word ganglion is for a tendon cyst that most ...