Focus
Hawkins' Electrical Dictionary · 1915 · p. 3
—1. The point of concentration. 2. A point at which rays of light meet, or seem to meet, after pa ing through a lens or being refiected from a mirror.
Bu kavram başka kaynaklarda da geçiyor
A Dictionary of Scientific Terms (1927)
Adair's New Encyclopedia (1923)
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)
Pears Shilling Cyclopedia (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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