这个词是什么意思？
The property of nonisotropic media, such as crystals, whereby a single incident beam of light traverses the medium as two beams, each plane-polarized, the planes being at right angles to each other. (Cline et al., Dictionary of Visual Science, 4th ed)
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D001718 · MeSH 2026。
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