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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 - «E»:

  1. Exomphalos-macroglossia-gigantism syndrome Exomphalos-macroglossia-gigantism syndrome
    Exomphalos-macroglossia-gigantism syndrome: See: Beckwith-Wiedemann syndrome....
  2. Exon Exon
    Exon: The region of a gene that contains the code for producing protein. Each exon codes for a specific portion of the complete protein. Exons are separated by introns, long regions of DNA that have no apparent function. Exons are also called coding DNA....
  3. Exonuclease Exonuclease
    Exonuclease: An enzyme that cleaves nucleotide bases sequentially from the free ends of a nucleic acid (DNA or RNA)....
  4. Exopeptidase Exopeptidase
    Exopeptidase: An enzyme that catalyzes the cleavage of the terminal (last) or next-to-last peptide bond from a polypeptide or protein, releasing a single amino acid or dipeptide. By contrast, an endopeptidase catalyzes the cleavage of then internal peptide bonds within a polypeptide or protein....
  5. Exophthalmos Exophthalmos
    Exophthalmos: Protruding eyeball. A common finding in hyperthyroidism (too much thyroid hormone) of Graves' disease....
  6. Exotropia Exotropia
    Exotropia: Divergent gaze. Also called external strabismus or, pejoratively, wall-eyed (like a walleyed pike). ...
  7. Expectorant Expectorant
    Expectorant: A medication that helps bring up mucus and other material from the lungs, bronchi, and trachea. An example of as expectorant is guaifenesin which promotes drainage of mucus from the lungs by thinning the mucus and also lubricates the irritated respiratory tract. Sometimes the term "exp...
  8. Expectoration Expectoration
    Expectoration: A big polysyllabic word for sputum or the act of bringing up and spitting out sputum. From the Latin expectorare, to expel from the chest, from ex-, out of + pectus, chest....
  9. Expiration date Expiration date
    Expiration date: The date for a drug estimated for its shelf life with proper storage in sealed containers away from harmful and variable factors like heat and humidity. The expiration date of a medicine is based on data, called accelerated stability data, from testing by the manufacturer, that sho...
  10. Explant Explant
    Explant: 1. The original meaning: to transfer tissue from the body and place it in a culture medium for growth; and the tissue that is transferred. 2. To remove a device that had been implanted. "It took about three hours to 'explant' Megan's pump (ventricular assist device)...." (New York Times, ...
  11. Explicit memory Explicit memory
    Explicit memory: Memory in which there is a need for conscious recollection in order to recall something. By contrast, in implicit memory there is a lack of conscious awareness in the act of recollection. Implicit memory may survive largely unimpaired at the same time as a person's powers of explic...
  12. Expressed sequence tag (EST) Expressed sequence tag (EST)
    Expressed sequence tag (EST): A unique stretch of DNA within a coding region of a gene that is useful for identifying full-length genes and serves as a landmark for mapping. An EST is a sequence tagged site (STS) derived from cDNA. An STS is a short segment of DNA which occurs but once in the genom...
  13. Expression, gene Expression, gene
    Expression, gene: See: Gene expression....
  14. Expressivity Expressivity
    Expressivity: The consistency of a genetic disease. For example, Marfan disease shows variable expressivity. Some persons with Marfan's merely have long fingers and toes while others have the full-blown disease with dislocation of the lens and dissecting aneurysm of the aorta. ...
  15. Expulsion, stage of Expulsion, stage of
    Expulsion, stage of: The part of labor from the full dilatation of the cervix until the baby is completely out of the birth canal. The second stage of labor....