An optical apparatus, used in lighthouses, etc., by which the whole, or nearly the whole, of the light from a lamp or other source is made…
| 单词 | θ80408 |
| 释义 | the world > matter > light > reflection > [noun] > objects or substances that reflect light > device for maximizing light (1) holophote1859 An optical apparatus, used in lighthouses, etc., by which the whole, or nearly the whole, of the light from a lamp or other source is made… |
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