a vault supported by or decorated with diagonal ribs.
noun 1. clearweed. 2. horse balm.
noun, Chemistry. 1. a white, poisonous, protein powder from the bean of the castor-oil plant. noun 1. (biochem) a highly toxic protein, a lectin, derived from castor-oil seeds: used in experimental cancer therapy ricin ri·cin (rī’sĭn, rĭs’ĭn) n. A poisonous protein that is extracted from the castor bean and is used as a biochemical reagent. […]
noun 1. the starchy seeds or grain of an annual marsh grass, Oryza sativa, cultivated in warm climates and used for food. 2. the grass itself. verb (used with object), riced, ricing. 3. to reduce to a form resembling rice: to rice potatoes. noun 1. an erect grass, Oryza sativa, that grows in East Asia […]
adjective, Chemistry. 1. of or derived from ricinoleic acid.