Zebra


‘When you hear hoof beats, think of horses, not zebras.’ For example, when someone develops a mild transient cough, a virus infection is the most logical and likely cause, and tuberculosis is a zebra.

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    Zeta-chain-associated protein kinase 70. A member of the protein tyrosine kinase family, ZAP-70 is normally expressed in T cells and natural killer cells and has a critical role in the initiation of T-cell signaling. ZAP-70 is expressed in T cells and tumors of T-cell lineage. A high level of ZAP-70 expression appears restricted to T-cell […]

  • Z chromosome

    A sex chromosome in certain animals, such as chickens, turkeys, and moths. In humans, males are XY and females XX, but in animals with a Z chromosome, males are ZZ and females are WZ.

  • Disorder, borderline personality

    Disorder, borderline personality: A serious mental illness characterized by pervasive instability in moods, interpersonal relationships, self-image, and behavior. This instability often disrupts family and work life, long-term planning, and the individual’s sense of self-identity. Originally thought to be at the “borderline” of psychosis, people with borderline personality disorder (BPD) suffer from a disorder of emotion […]

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    A vivid dreamlike hallucination that occurs as one is waking up. The opposite of an hypnagogic hallucination, which occurs as one is falling asleep.


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