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(of a reflecting surface or lens) deviating slightly from a perfectly shape and relatively free from aberrations.


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  • Aspherical surface

    noun (photog) a lens or mirror surface that does not form part of a sphere and is used to reduce aberrations

  • Asphodel

    any of various southern European plants of the genera Asphodelus and Asphodeline, of the lily family, having white, pink, or yellow flowers in elongated clusters. any of various other plants, as the daffodil. Historical Examples His favourite plants were the vine, ivy, laurel, and asphodel. Myths and Legends of Ancient Greece and Rome E.M. Berens […]

  • Asphyxia

    the extreme condition caused by lack of oxygen and excess of carbon dioxide in the blood, produced by interference with respiration or insufficient oxygen in the air; suffocation. Contemporary Examples Homicidal violence including blunt force injury, sharp force injury, asphyxia, and gunshot wounds cannot be excluded. Autopsies on Hannah Anderson’s Family Bring Police No Closer […]

  • Asphyxia neonatorum

    asphyxia neonatorum asphyxia neonatorum asphyxia ne·o·na·to·rum (nē’ō-nā-tôr’əm) n. Asphyxia occurring in a newborn.

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