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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «H»:

  1. Hyperexplexia Hyperexplexia
    Hyperexplexia: A genetic disorder in which babies have an exaggerated startle reflex (reaction). This disorder was not recognized until 1962 when it was described by Drs. Kok and Bruyn as a disease with the onset at birth of hypertonia (stiffness), exaggerated startle response, strong brain-stem ref...
  2. Hyperextensible Hyperextensible
    Hyperextensible: Unusually capable of being extended and stretched. Hyperextensible skin is a feature of Ehlers-Danlos syndrome....
  3. Hyperglycemia Hyperglycemia
    Hyperglycemia: A high blood sugar. An elevated level specifically of the sugar glucose in the blood. Hyperglycemia is often found in diabetes mellitus. It occurs when the body does not have enough insulin or cannot use the insulin it has to turn glucose into energy. Hyperglycemia may also occur ...
  4. Hyperglycemic response Hyperglycemic response
    Hyperglycemic response: A response resulting in a high blood sugar and specifically elevating the level of the sugar glucose in the blood. Hyperglycemia is often found in diabetes mellitus. It occurs when the body does not have enough insulin or cannot use the insulin it has to turn glucose into ...
  5. Hypergraphia Hypergraphia
    Hypergraphia: The driving compulsion to write; the overwhelming urge to write. Hypergraphia may compel someone to keep a voluminous journal, to jot off frequent letters to the editor, to write on toilet paper if nothing else is available, and perhaps even to compile a dictionary. Hypergraphia is the...
  6. Hypergraphic Hypergraphic
    Hypergraphic: A person with hypergraphia, the insatiable urge to write....
  7. Hyperhidrosis Hyperhidrosis
    Hyperhidrosis: Excessive sweating. Hidrosis meaning sweating, so hyperhidrosis is too much sweating....
  8. Hyperhidrosis, axillary Hyperhidrosis, axillary
    Hyperhidrosis, axillary: See: Axillary hyperhidrosis....
  9. Hyperhidrosis, palmoplantar Hyperhidrosis, palmoplantar
    Hyperhidrosis, palmoplantar: See: Palmoplantar hyperhidrosis....
  10. Hyperhidrotic Hyperhidrotic
    Hyperhidrotic: Pertaining to hyperhidrosis, excessive sweating. Hidrosis meaning sweating, so hyperhidrosis is too much sweating....
  11. Hyperkalemia Hyperkalemia
    Hyperkalemia: Elevated blood potassium. Potassium is the major positive ion (cation) found inside of cells. The chemical notation for potassium is K+. The proper level of potassium is essential for normal cell function. An abnormal increase (or decrease) of potassium can profoundly affect the ...
  12. Hyperlexia Hyperlexia
    Hyperlexia: The presence of advanced ability to read compared to the ability to understand spoken language. Children with hyperlexia have a precocious ability to read words, far above what would be expected at their chronological age or an intense fascination with letters or numbers; significant di...
  13. Hyperlipidemia Hyperlipidemia
    Hyperlipidemia: High lipid (fat) levels in the blood. Lipids are transported in the blood as large molecules known as lipoproteins. There are 5 major families of lipids in the blood: chylomicrons, very low-density lipoproteins (VLDL), intermediate-density lipoproteins (IDL), low-density lipoproteins...
  14. Hypermagnesemia Hypermagnesemia
    Hypermagnesemia: Excess magnesium. Persons with impaired kidney function should be especially careful about their magnesium intake because they can accumulate magnesium, a dangerous (and sometimes fatal) situation. According to the National Academy of Sciences, the Recommended Dietary Allowances of ...
  15. Hypermnesia Hypermnesia
    Hypermnesia: Abnormally strong memory of the past. As compared to hypomnesia and amnesia. From hyper- + the Greek mneme, memory....