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Medical Dictionary Terms Beginning with Y
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Y (in chemistry)
Y (in chemistry): The symbol for the element yttrium, an ultrarare metal named after Ytterby in southern Sweden. Yttrium has been used in certain nuclear medicine scans.more detail info...
Y (in genetics)
Y (in genetics): The Y chromosome, the sex chromosome found in normal males, together with an X chromosome.more detail info...
Y chromatin
Y chromatin: Brilliantly fluorescent body seen in cells stained with the dye quinacrine which lights up the Y chromosomes most brightly.more detail info...
Y chromosome
Y chromosome: The sex chromosome found in normal males, together with an X chromosome. Once thought to be a genetic wasteland, the Y now is known to contain at least 20 genes, some of them unique to the Y including the male-determining gene and male fmore detail info...
Y map
Y map: The array of genes on the Y chromosome. Once thought to be a genetic wasteland, the Y now is known to contain at least 20 genes, some of them unique to the Y including the male-determining gene and male fitness genes that are active only in themore detail info...
YAC
YAC: Yeast artificial chromosome.more detail info...
Yag laser surgery
Yag laser surgery: The use of a laser to punch a hole in the iris to relieve increased pressure within the eye as, for example, from acute angle-closure glaucoma. Yag laser surgery is an office procedure.more detail info...
Yard
Yard: In length, 3 feet or 36 inches or, metrically, 86.44 centimeters. The yard, along with the foot and inch, are English creations to which the USA has stubbornly clung. The yard was originally a unit of measurement of land and was about 5 meters (more detail info...
Yawn
Yawn: Involuntary opening of mouth often caused by suggestion and accompanied by breathing inward then outward. Repeated yawning can be a sign of drowsiness or depression.more detail info...
Yaws
Yaws: A common chronic infectious disease that occurs mainly in the warm humid regions of the tropics with characteristic bumps on the skin of the face, hands, feet and genital area. Almost all cases of yaws are in children under 15 years of age.more detail info...
yd.
yd.: Abbreviation for the measure of length, a yard. For example, an American football field is 100 yds. long.more detail info...
Yeast
Yeast: A group of single-celled fungi that reproduce by budding. Although most yeast are harmless (some are used in baking and brewing), other yeast can cause disease in humans. For example, the yeast Candida (once called Monilia) causes thrush (oralmore detail info...
Yeast artificial chromosome (YAC)
Yeast artificial chromosome (YAC): A vector created and used in the laboratory to clone pieces of DNA. A YAC is constructed from the telomeric (end), centromeric, and replication origin sequences needed for replication in yeast cells.more detail info...
Yeast syndrome
Yeast syndrome: The yeast Candida has been thought to cause a syndrome with a number of nonspecific problems including fatigue, loss of appetite, headache, short-attention span, depression and all manner of intestinal irregularities. There is no scienmore detail info...
Yellow enzyme, Warburg's
Yellow enzyme, Warburg's: A key respiratory enzyme discovered by the German biochemist Otto Heinrich Warburg (1883-1970), a pioneer in research on the respiration of cells and the metabolism of tumors. Warburg's yellow enzyme is a flavoprotein that catalmore detail info...
Yellow enzymes
Yellow enzymes: A group of respiratory enzymes that catalyze reactions in the body permitting cells to respire, to breath. These biochemical reactions are termed oxidation-reduction reactions. The first yellow enzyme was discovered by the German biochemmore detail info...
Yellow fever
Yellow fever: An acute systemic (bodywide) viral illness with in severe cases a high fever, bleeding into the skin and death of cells (necrosis) in kidney and liver, the liver damage causing intense jaundice (yellowing). Yellow fever once ravaged portmore detail info...
Yellow fever vaccination
Yellow fever vaccination: A live attenuated (weakened) viral vaccine recommended for people traveling to or living in tropical areas in the Americas and Africa where yellow fever occurs.more detail info...
Yellow jacket stings
Yellow jacket stings: Stings from yellow jackets and other large stinging insects such as bees, hornets and wasps can trigger allergic reactions of varying severity. Avoidance and prompt treatment are essential. In selected cases, allergy injection thmore detail info...
Yersinia
Yersinia: A group of bacteria some of which are responsible for the bubonic plague (see Yersinia pestis), intestinal infections and a condition called mesenteric lymphadenitis that can mimick appendicitis.more detail info...
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