“polyoptron”的英文意思_释义_用法

单词

polyoptron

释义

‖ polyoptron, -um|pɒlɪˈɒptrən, -əm|
[mod.L., f. Gr. πολυ-, poly- + -οπτρον, naming instruments of sight: see diopter.]
An optical instrument through which objects appear multiplied; a multiplying-glass (see quot. 1842). Cf. polyscope 1.
1727–41Chambers Cycl., Polyoptrum,..a glass through which objects appear multiplied, but diminished.1842Brande Dict. Sc., etc., Polyoptron, in Optics, a glass through which objects appear multiplied, but diminished. It consists of a lens one side of which is plane, but in the other are ground several spherical concavities.

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