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  2. Halo sign - Wikipedia

    It can be associated with hemorrhagic nodules, tumors, or inflammatory processes, but is most commonly known as an early radiographic sign of invasive pulmonary infection by the fungus species Aspergillus. In nursing, the halo sign is the result of a test to see if drainage from a head injury contains cerebrospinal fluid. When a Dextrostix or ...

  3. Murphy's sign - Wikipedia's_sign

    In medicine, Murphy's sign (also known as Sweeney’s sign) is a maneuver during a physical examination as part of the abdominal examination. It is useful for differentiating pain in the right upper quadrant. Typically, it is positive in cholecystitis, but negative in choledocholithiasis, pyelonephritis, and ascending cholangitis

  4. Null sign - Wikipedia

    The null sign (∅) is often used in mathematics for denoting the empty set (however, the variant seems more commonly used). The same letter in linguistics represents zero , the lack of an element. It is commonly used in phonology , morphology , and syntax .

  5. Sign extension - Wikipedia

    Sign extension (abbreviated as sext) is the operation, in computer arithmetic, of increasing the number of bits of a binary number while preserving the number's sign (positive/negative) and value. This is done by appending digits to the most significant side of the number, following a procedure dependent on the particular signed number ...

  6. Single sign-on - Wikipedia

    Conversely, single sign-off or single log-out (SLO) is the property whereby a single action of signing out terminates access to multiple software systems. As different applications and resources support different authentication mechanisms, single sign-on must internally store the credentials used for initial authentication and translate them to ...

  7. Lazarus sign - Wikipedia

    The Lazarus sign or Lazarus reflex is a reflex movement in brain-dead or brainstem failure patients, which causes them to briefly raise their arms and drop them crossed on their chests (in a position similar to some Egyptian mummies).

  8. Frontal release sign - Wikipedia

    Frontal release signs are primitive reflexes traditionally held to be a sign of disorders that affect the frontal lobes.The appearance of such signs reflects the area of brain dysfunction rather than a specific disorder which may be diffuse, such as a dementia, or localised, such as a tumor.

  9. Grey Turner's sign - Wikipedia's_sign

    Grey Turner's sign refers to bruising of the flanks, the part of the body between the last rib and the top of the hip. The bruising appears as a blue discoloration, [1] and is a sign of retroperitoneal hemorrhage , or bleeding behind the peritoneum, which is a lining of the abdominal cavity.