Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A diatomic molecule existing in an energy level above the ground state.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any diatomic molecule, at least one of whose atoms is in an excited state

Etymologies

exc(ited) + (d)imer.
(American Heritage® Dictionary of the English Language, Fourth Edition)
exci- + -mer (Wiktionary)

Examples

  • The experimental procedure, called photo-refractive keratectomy (PRK) and performed only by ophthalmologists, uses a new "excimer" laser to treat moderate degrees of nearsightedness (myopia).

    A Light For Poor Eyes

  • For mild cases of psoriasis, excimer and pulsed dye laser treatments are used when topical applications cease to be effective.

    Psoriasis Guru » Blog Archive » UV Light – UVA and UVB Phototherapy

  • Striae albae the white, shiny scars, can be repigmented with an excimer laser, which emits UVB light that stimulates melanocytes to make more melanin in that area.

    Simple Skin Beauty

  • The excimer laser "is very effective for localized plaques and is particularly useful for palms and soles," where topical treatments aren't practical, says Mark Lebwohl, head of dermatology at Mount Sinai Hospital in New York and chairman of the medical board of the National Psoriasis Foundation.

    New Laser for Psoriasis Aims to Cut Treatment

  • However, John Koo, vice chairman of the department of dermatology at the University of California in San Francisco, says that the excimer won't work any faster than the light chamber if doctors use it in a "wimpy" way.

    New Laser for Psoriasis Aims to Cut Treatment

  • The excimer laser, best known for its use in eye surgery, is now being used to treat psoriasis.

    New Laser for Psoriasis Aims to Cut Treatment

  • So far the excimer laser is used primarily for small patches because treating large areas would take a half hour or more, making the visit economically impractical for the doctor.

    New Laser for Psoriasis Aims to Cut Treatment

  • The excimer can result in burns and blisters similar to sunburn.

    New Laser for Psoriasis Aims to Cut Treatment

  • Unlike lasers used in other types of eye surgery, which destroy tissue with heat, the excimer vaporizes microscopically thin sections of the cornea by breaking the chemical bonds between molecules -- without harming adjacent tissue.

    A Light For Poor Eyes

  • Controlled by computer, the excimer laser used in PRK emits short, high-energy pulses of cool ultraviolet radiation.

    A Light For Poor Eyes

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