| 单词 | prism |
| 释义 | prism /priz"euhm/, n. 1. Optics. a transparent solid body, often having triangular bases, used for dispersing light into a spectrum or for reflecting rays of light. 2. Geom. a solid having bases or ends that are parallel, congruent polygons and sides that are parallelograms. 3. Crystall. a form having faces parallel to the vertical axis and intersecting the horizontal axes. [1560-70; < LL prisma < Gk prîsma lit., something sawed, akin to prízein to saw, pristes sawyer] |
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