(botany) the protection against a viral infection given to a plant by its prior inoculation with a related but milder virus
[kraws-kwes-chuh n, kros-] /ˈkrɔsˈkwɛs tʃən, ˈkrɒs-/ verb (used with object) 1. to cross-examine. noun 2. a question asked by way of cross-examination. verb (transitive) 1. to cross-examine noun 2. a question asked in cross-examination
[kraws-reyl, kros-] /ˈkrɔsˌreɪl, ˈkrɒs-/ noun 1. a horizontal slat forming part of the back of a chair.
noun, Geometry. 1. a ratio relating four points in the real or complex plane.
[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.