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Medical Dictionary

1

focus

play
noun fo·cus \ˈfō-kəs\

Medical Definition of focus

plural foci \ˈfō-ˌsī also -ˌkī\play play also focuses

  1. 1a:  a point at which rays (as of light, heat, or 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 intersect and give rise to an image after reflection by a mirror or refraction by a lens or optical systemb:  a point of convergence of a beam of particles (as electrons)

  2. 2a:  focal lengthb:  adjustment for distinct vision; also :  the area that may be seen distinctly or resolved into a clear image

  3. 3:  a localized area of disease or the chief site of a generalized disease or infection




2

focus

verb fo·cus

Medical Definition of focus

focused also focussed; focusing also focussing

  1. 1

  2. transitive verb

  3. :  to bring (as light rays) to a focus

  4. 2a:  to adjust the focus of (as the eye or a lens)b:  to bring (as an image) into focus

  5. 1

  6. intransitive verb

  7. :  to come to a focus

  8. 2:  to adjust one's eye or a camera to a particular range

focusable \-kəs-ə-bəl\play adjective




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