Three

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Three

Three (pronounced /θriː/) is a number, numeral, and glyph. It is the natural number following two and preceding four.

Etymology

The word "three" comes from the Old English þrīe, which is first recorded in the 8th century. It is derived from the Proto-Germanic *þrīz, which in turn comes from the Proto-Indo-European *tréyes.

Medical Significance

In the medical field, the number three is often associated with the concept of triads. A triad is a set of three associated entities or symptoms that often occur together. For example, the Charcot's triad in medicine refers to the combination of jaundice, fever with chills, and right upper quadrant pain, which are the three key features of ascending cholangitis.

Another example is the Cushing's triad, a clinical syndrome characterized by three primary signs: hypertension, bradycardia, and abnormal respirations. These are indicative of increased intracranial pressure.

Related Terms

  • Triad (medicine): A set of three associated entities or symptoms that often occur together.
  • Charcot's triad: A set of three symptoms characteristic of cholangitis.
  • Cushing's triad: A clinical syndrome characterized by three primary signs indicative of increased intracranial pressure.

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