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Drugs and diseases reference index

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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «D»:

  1. Dihydroorotate dehydrogenase Dihydroorotate dehydrogenase
    Dihydroorotate dehydrogenase: An enzyme necessary to pyrimidine synthesis and therefore essential to the production of DNA and RNA. The drug leflunomide (Arava), an immunomodulatory agent, acts by specifically inhibiting dihydroorotate dehydrogenase....
  2. Dihydrotestosterone Dihydrotestosterone
    Dihydrotestosterone: A byproduct of the male hormone testosterone. Dihydrotestosterone (DHT) is considered to be the essential androgenic hormone. DHT is responsible for the formation of male primary sex characteristics during embryonic life. It is responsible for the development of most secondary s...
  3. Dihydroxyacetone Dihydroxyacetone
    Dihydroxyacetone: Also known as DHA, the active ingredient in most sunless tanning lotions. See: DHA....
  4. Dilatate Dilatate
    Dilatate: To enlarge or expand. For example, to dilatate the eye is to enlarge the pupil temporarily with special (mydriatic) eye drops. This procedure allows the eye care specialist to better view the inside of the eye. The word "dilate" means the same thing as "dilatate"....
  5. Dilatation Dilatation
    Dilatation: The process of enlargement or expansion. For example, dilatation of the eye is the process by which the pupil is temporarily enlarged with special (mydriatic) eye drops. This allows the eye care specialist to better view the inside of the eye. The word "dilation" means the...
  6. Dilatation and curettage Dilatation and curettage
    Dilatation and curettage: A minor operation in which the cervix is expanded enough (dilatation) to permit the cervical canal and uterine lining to be scraped with a curet (or curette), an instrument shaped like a spoon. This procedure also is called D and C....
  7. Dilate Dilate
    Dilate: To stretch or enlarge. It comes from the Latin verb "dilatare" meaning "to enlarge or expand."...
  8. Dilated cardiomyopathy Dilated cardiomyopathy
    Dilated cardiomyopathy: A disorder in which the chambers of the heart are dilated (enlarged) because the heart muscle is weakened and cannot pump effectively. There are many causes, the most common being myocardial ischemia (not enough oxygen supplied to the heart muscle) due to coronary artery dise...
  9. Dilating Dilating
    Dilating: The widening and opening of the cervix caused by uterine contractions....
  10. Dilation Dilation
    Dilation: The process of enlargement, stretching, or expansion. The word "dilatation" means the same thing. Both come from the Latin "dilatare" meaning "to enlarge or expand."...
  11. Dilation, pupil Dilation, pupil
    Pupil dilation: This examination enables your eye care professional to see more of your retina, the light-sensitive layer of tissue at the back of your eye. Dilating (widening) the pupil permits your eye to be examined for signs of disease. To do this, drops are placed into the eye to dilate (...
  12. Dilation, pupil (test) Dilation, pupil (test)
    Dilation, pupil (test): This examination enables your eye care professional to see more of your retina, the light-sensitive layer of tissue at the back of your eye. Dilating (widening) the pupil permits the retina to be examined for signs of disease. To do this, drops are placed into the eye t...
  13. Dilator Dilator
    Dilator: A device used to stretch or enlarge an opening. Patients with scarring of the muscular tube through which food passes from the throat to the stomach (esophagus) can require a dilator procedure in order to open the esophagus for adequate passage of food and fluids....
  14. Dinucleotide Dinucleotide
    Dinucleotide: A sequence of 2 base pairs. A trinucleotide (a triplet of base pairs) may be split into a dinucleotide and a mononucleotide....
  15. Dioscorides Dioscorides
    Dioscorides: Dioscorides of Anazarbus. First century Greek physician, botanist and pharmacologist whose encyclopedia of materia medica was used for centuries after his death. Born in southeast Asia Minor in the Roman Empire in the first few decades C.E. During his lifetime, Dioscorides traveled ex...