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WordNet 3.0Copyright Princeton University
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Short "hint"

A point at which rays (as of light, heat, sound) converge or from which they diverge or appear to diverge; specifically : the point where the geometrical lines or their prolongations conforming to the rays diverging from or converging toward another point

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Usage examples (31)
  • These structures were very similar to those termed foci found previously in RPE cells
  • The two "centres" are called foci (which is the plural of focus - one focus, two foci).
  • In this study, the researchers demonstrated that Vpr forms mobile structures called foci on the DNA of host cells.
  • Some epilepsy is triggered by the activity of a small identifiable area, known as the foci, and spreads to the rest of the brain with catastrophic effect.
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