chemical reaction: (chemistry) a process in which one or more substances are changed into others
chemical process: (chemistry) any process determined by the atomic and molecular composition and structure of the substances involved
rosidae: a group of trees and shrubs and herbs mostly with polypetalous flowers; contains 108 families including Rosaceae; Crassulaceae; Myrtaceae; Melastomaceae; Euphorbiaceae; Umbelliferae