FOCUS
Pears Shilling Cyclopedia · 1898 · p. 75
is the point where the rays of light reflected or refracted by a mirror or lens meet.
Bu kavram başka kaynaklarda da geçiyor
A Dictionary of Scientific Terms (1927)
Adair's New Encyclopedia (1923)
Hawkins' Electrical Dictionary (1915)
The American Illustrated Medical Dictionary (1913)
The American Dictionary and Cyclopedia (1910)
The Nurse's Dictionary of Medical Terms and Nursing Treatment (1909)
Webster's Condensed Dictionary- A Condensed Dictionary of the English Language (1909)
Chamber's Twientieth Century Dictionary (1908)
The Optical Dictionary (1904)
Chandler's Encyclopedia (1898)
Chamber's Etymological of the English Language (1895)
An Illustrated Encyclopedic Medical Dictionary (1893)
Webster's Practical Dictionary- A Practical Dictionary of the Englih Language (1884)
Zell's Condensed Dictionary (1879)
A Military Dictionary (1810)
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