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noun, Geometry.
a ratio relating four points in the real or complex plane.


Read Also:

  • Cross-react

    [kraws-ree-akt, kros-] /ˈkrɔs riˈækt, ˈkrɒs-/ verb (used without object), Immunology. (of an antigen, antibody, or lymphocyte) 1. to participate in a cross-reaction.

  • Cross-reacting agglutinin

    cross-reacting agglutinin n. See group agglutinin.

  • Cross-reacting antibody

    cross-reacting antibody n. An antibody that reacts with an antigen other than the one that induced its production.

  • Cross-reaction

    [kraws-ree-ak-shuh n-kros-] /ˈkrɔs riˈæk ʃənˈkrɒs-/ noun 1. an immunologic reaction between a given antigen and an antibody or lymphokine that is specific for a different antigen resembling the first one.

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