Sine qua non

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Sine qua non

Sine qua non (pronounced: /ˌsiːneɪ kwɑː ˈnɒn/), is a Latin phrase that translates to "without which not". It is used to refer to an essential condition or requirement that is absolutely necessary.

Etymology

The term "sine qua non" is derived from the Latin words "sine" meaning "without", "qua" meaning "which", and "non" meaning "not". It is used to denote something that is indispensable or a prerequisite.

Usage in Medicine

In the field of medicine, "sine qua non" is often used to describe a symptom, sign, or condition that is absolutely necessary to make a particular diagnosis. For example, the presence of a certain bacteria or virus in the body could be the "sine qua non" for diagnosing a specific disease.

Related Terms

  • Prerequisite: A condition or requirement that must be fulfilled before something else can happen or be done.
  • Indispensable: Absolutely necessary or essential.
  • Diagnosis: The identification of the nature of an illness or other problem by examination of the symptoms.
  • Disease: A disorder of structure or function in a human, animal, or plant, especially one that produces specific symptoms or that affects a specific location.

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