from The Century Dictionary and Cyclopedia

  • n. In mathematics, the locus of points in a plane (having a correspondence with another plane), which have, each of them, two of their corresponding points in the other plane coincident.


Sorry, no etymologies found.


  • It has clear advantage in long exposures; past one second of exposure time Kodachrome 64 experiences cross-curve reciprocity failures, in principle correctable by use of filters, but these filters are very difficult to obtain.

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