principal point

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principal point [′prin·sə·pəl ′pȯint]

(optics)

The intersection of a principal plane with the optical axis.

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No references found			The princess for her part, going round the question in the manner peculiar to women, maintained that Kitty was too young, that Levin had done nothing to prove that he had serious intentions, that Kitty felt no great attraction to him, and other side issues; but she did not state the principal point, which was that she looked for a better match for her daughter, and that Levin was not to her liking, and she did not understand him. Anna Karenina by Tolstoy, Leo View in context The principal point is, that he is sure not to divulge the secret, for the very good reason that he does not know it himself. The Black Tulip by Dumas, Alexandre View in context			principal directions principal distance principal E plane principal elevation principal facade principal façade Principal Focus principal function principal H plane principal homomorphism principal ideal principal ideal ring principal item principal joist principal line principal lobe principal meridian principal mode principal moments principal normal principal normal indicatrix principal normal section principal part principal plane principal plane of stress principal point principal post principal purlin principal quantum number principal radii principal radii of normal curvature principal rafter principal rafter roof principal ray principal roof principal root principal section principal series principal strain principal stress principal submatrix principal type principal value principal vertical circle principal visual ray Principality Principate Principe Príncipe Principle Principle of Abstraction			principal operational interest Principal Operations Inspector principal optic axis Principal Order Principal Orders Principal Organic Dangerous Constituent Principal Organic Hazardous Constituent Principal Outer Membrane Protein principal parallel Principal part Principal part principal parts Principal Payments Principal Period of Operation principal person principal piece principal piece principal piece principal piece principal piece principal place of business principal place of business principal place of business Principal Place of Residence principal plane principal plane principal plane principal plane of stress principal plane radiographic beam Principal Planning Agent principal point Principal Point of Contact Principal Polarization principal post Principal Preparation and Certification Program Principal Private Secretary Principal Professional and Technology Officer Principal Project Resident Representative Principal Protected Fund Principal Protected Note Principal Protected Note Principal protected notes Principal Protected Property Note Principal Protection Fund Principal Protection Funds Principal Public Transport Network principal purlin Principal quantium number Principal quantum number Principal quantum number Principal Race Officer principal radii principal radii of normal curvature Principal rafter principal rafter roof Principal Ratio Combining Principal ray Principal ray

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