nuclei nuclei  /ˈnu kli ˌaɪ/


  1. (n) a part of the cell containing DNA and RNA and responsible for growth and reproduction
  2. (n) the positively charged dense center of an atom
  3. (n) a small group of indispensable persons or things
  4. (n) (astronomy) the center of the head of a comet; consists of small solid particles of ice and frozen gas that vaporizes on approaching the sun to form the coma and tail
  5. (n) any histologically identifiable mass of neural cell bodies in the brain or spinal cord
  6. (n) the central structure of the lens that is surrounded by the cortex


  1. These nuclei break apart when bombarded by neutrons, uncharged subatomic particles that are initially provided by a reactor ignition device.
  2. Mason's next step was to cool droplets containing microscopic nuclei made of substances that are common in powder-fine dust blown up from the earth's surface.
  3. They removed the nuclei of unfertilized egg cells from female frogs.


  1. X-Ray Laser Could See Smuggled Nukes

    A laser so powerful it kicks atomic nuclei at up to 10 percent of light speed could one day detect smuggled nuclear material in ports. Continue reading ?
    on June 10, 2013     Source: Discovery News

  2. Increased NMR/MRI sensitivity through hyperpolarization of nuclei in diamond

    Researchers have demonstrated the first magnetically-controlled nearly complete hyperpolarization of the spins of carbon-13 nuclei located near synthetic defects in diamond crystals. This spin hyperpolarization, which can be carried out with refrigerator-style magnets at room temperature, enhances NMR/MRI sensitivity by many orders of magnitude.
    on June 6, 2013     Source: Science Daily


  1. "This process will create temperatures of 100 million degrees and pressures billions of times greater than Earth's atmospheric pressure, forcing the hydrogen nuclei to fuse and release many times more energy than the laser energy required to spark...
    on Mar 30, 2009 By: Edwin Moses Source: BBC News

  2. "The discovery of the hitherto unknown heaviest magnesium and aluminum isotopes at NSCL is a milestone in rare isotope research and is a great accomplishment for the worldwide scientific community exploring unstable nuclei close to the so-called...
    on Oct 24, 2007 By: Horst Stöcker Source: EurekAlert (press release)

  3. "While quasars are spectacular, they are not representative of typical active galactic nuclei," says Brandt. "Now, using Chandra and other X-ray observatories, we can find and study the moderate-luminosity, typical active galactic nuclei in...
    on Feb 17, 2006 By: Niel Brandt Source: EurekAlert (press release)

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engender engender
/ɛn ˈdʒɛn dər /