Normal
The Optical Dictionary · 1904 · p. 15
(a) A straight line so drawn from a_ surface that it is perpendicular to the tangent-plane at the point of contact. (b) Constituting a standard.
Bu kavram başka kaynaklarda da geçiyor
A Dictionary of Scientific Terms (1927)
A French-English Dictionary for Chemists (1921)
French-English Dictionary of Military Terms (1918)
French-English and English-French Commercial Dictionary (1918)
A Law Dictionary (1910)
The Nurse's Dictionary of Medical Terms and Nursing Treatment (1909)
A Dictionary of Men's Wear (1908)
Explanation of Terms Used in Entomology (1906)
The Student's Medical Dictionary (1896)
Zell's Condensed Dictionary (1879)
Dictionary of Science, Literature and Art (1854)
Dictionary of Science, Literature and Art (1842)
The American Dictionary and Cyclopedia
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