tau

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noun \ˈtau̇, ˈtȯ\

Definition of tau

  1. 1 :  the 19th letter of the Greek alphabet — see alphabet table

  2. 2 :  a short-lived elementary particle of the lepton family that exists in positive and negative charge states and has a mass about 3500 times greater than an electron —called also tau particle

  3. 3 :  a protein that binds to and regulates the assembly and stability of neuronal microtubules and that is found in an abnormal form as the major component of neurofibrillary tangles

Origin and Etymology of tau

Middle English taw, from Latin tau, from Greek, of Semitic origin; akin to Hebrew tāw taw


First Known Use: 14th century


Medical Dictionary

noun \ˈtau̇, ˈtȯ\

Medical Definition of tau

  1. :  a protein that binds to and regulates the assembly and stability of neuronal microtubules and that is found in an abnormal form as the major component of neurofibrillary tangles—called also tau protein


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