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Drugs and diseases reference index

Drugs and diseases reference index
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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «A»:

  1. Abiotrophy Abiotrophy
    Abiotrophy: Loss of function or degeneration for reasons unknown. For example, cerebellar abiotrophy may affect coordination while cone-rod abiotrophy may cause blindness at birth....
  2. Ablate Ablate
    Ablate: To remove. A tumor may be ablated. To ablate the thyroid gland is to remove it. The word "ablation" came from the Latin "ablatum" meaning to carry away. In 1671 the ablation (removal) of a disease was a matter for consideration. But by 1846 "ablation" had taken on a specifically sur...
  3. Ablation Ablation
    Ablation: Removal or excision. Ablation is usually carried out surgically. For example, surgical removal of the thyroid gland (a total thyroidectomy) is ablation of the thyroid. The word ablation comes from the Latin ablatum meaning to carry away. Historically, the word ablation once had mainly a...
  4. Ablation, endometrial Ablation, endometrial
    Ablation, endometrial: Removal of the lining of the womb. Removing the uterine lining decreases menstrual flow or stops it completely. Ablation means removal or excision, usually surgically. The word comes from the Latin ablatum meaning to carry away. The endometrium is the inner layer of the uterus...
  5. Abnormal Abnormal
    Abnormal: Not normal. Deviating from the usual structure, position, condition, or behavior. In referring to a growth, abnormal may mean that it is cancerous or premalignant (likely to become cancer)....
  6. ABO blood group ABO blood group
    ABO blood group: The major human blood group system. A person's ABO type depends upon the presence of absence of two genes --the A and B genes. These genes are encoded on chromosome 9 (in band 9q34.1). They determine part of the configuration of the red blood cell surface. A person can be A, B, AB, ...
  7. Abortifacient Abortifacient
    Abortifacient: A substance that causes pregnancy to end prematurely and causes an abortion....
  8. Abortion Abortion
    Abortion: In medicine, an abortion is the premature exit of the products of conception (the fetus, fetal membranes, and placenta) from the uterus. It is the loss of a pregnancy and does not refer to why that pregnancy was lost. A spontaneous abortion is the same as a miscarriage. The miscarriage...
  9. Abortion, artificial Abortion, artificial
    Abortion, artificial: An abortion that is brought about intentionally. Also called an induced or therapeutic abortion. As opposed to a spontaneous abortion (a miscarriage)....
  10. Abortion, habitual Abortion, habitual
    Abortion, habitual: The miscarriage of 3 or more consecutive pregnancies. The abortion of 3 or more miscarriages (spontaneous abortions) with no intervening pregnancies is also termed recurrent abortion. Habitual or recurrent abortion is a form of infertility. It is sometimes due to chromosome abno...
  11. Abortion, induced Abortion, induced
    Abortion, induced: An abortion that is brought about intentionally. Also called an artificial or therapeutic abortion. As opposed to a spontaneous abortion (a miscarriage)....
  12. Abortion, multiple Abortion, multiple
    Abortion, multiple: Two or more miscarriages (spontaneous abortions) by a woman. Couples who have had multiple abortions have about a 5% chance that one member of the couple is carrying a chromosome translocation responsible for the miscarriages....
  13. Abortion, recurrent Abortion, recurrent
    Abortion, recurrent: The occurrence of 3 or more miscarriages (which are medically termed "spontaneous abortions") with no intervening pregnancies. Recurrent abortion (or, as it is sometimes called, habitual abortion) is a form of infertility. It may be due to chromosome abnormalities....
  14. Abortion, spontaneous Abortion, spontaneous
    Abortion, spontaneous: A miscarriage, that is, any pregnancy that is not viable (the fetus cannot survive) or in which the fetus is born before the 20th week of pregnancy. Spontaneous abortion occurs in at least 15-20% of all recognized pregnancies and usually takes place before the 13th week of ...
  15. Abortion, therapeutic Abortion, therapeutic
    Abortion, therapeutic: An abortion that is brought about intentionally. Also called an artificial or induced abortion. As opposed to a spontaneous abortion (a miscarriage)....