“astigmatism”的概念、定义、翻译、参考文献-科学参考

单词	astigmatism
释义	astigmatism [ǝ`stig·mǝ´tiz·ǝm] ^ELECTRONICS In an electron-beam tube, a focus defect in which electrons in different axial planes come to focus at different points. ^MEDICINE A defect of vision due to irregular curvatures of the refractive surfaces of the eye so that focal points of light are distorted. ^OPTICS The failure of an optical system, such as a lens or a mirror, to image a point as a single point; the system images the point on two line segments separated by an interval.
随便看	ionomer resin ionone ionophone ionophore ionosonde ionosphere ionospheric disturbance ionospheric D scatter meteor burst ionospheric error ionospheric propagation ionospheric recorder ionospheric scatter ionospheric storm ionospheric wave ion pair ion-permeable membrane ion potential ion probe ion propulsion ion pump ion retardation ion scattering spectroscopy ion-selective field-effect transistor ion-solid interaction ion source

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