Concave
The Optical Dictionary · 1904 · p. 4
In optics, a lens hollow or depre ed in the centre.
Bu kavram başka kaynaklarda da geçiyor
A Dictionary of Scientific Terms (1927)
Stedman's Medical Dictionary: A Practical Medical Dictionary (1920)
French-English Dictionary of Military Terms (1918)
French-English and English-French Commercial Dictionary (1918)
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The American Illustrated Medical Dictionary (1913)
A Dictionary of Aviation (1911)
Chamber's Twientieth Century Dictionary (1908)
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The Student's Medical Dictionary (1896)
An Illustrated Encyclopedic Medical Dictionary (1892)
Webster's Practical Dictionary- A Practical Dictionary of the Englih Language (1884)
An Illustrated Dictionary of Words Used In Art and Archealogy. (1883)
Zell's Condensed Dictionary (1879)
Plano-concave
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Hawkins' Electrical Dictionary (1915)
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