Cross-ratio
noun, Geometry.
1.
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. 
- Cross-refer  [kraws-ri-fur, kros-] /ˌkrɔs rɪˈfɜr, ˌkrɒs-/ verb (used with or without object), cross-referred, cross-referring. 1. to refer by a cross reference. verb 1. to refer from one part of something, esp a book, to another 
