Search calcium oxalate (CaC2O4) calcium oxalate (CaC2O4), a small, colorless crystal that may be present in urine or may be a component of renal calculi. Tweet Telegram VK Random Words FFA Integrated Group Without Walls benzethonium chloride laryngeal catheterization yaw psorelcosis tectorium sclerose Mammography Quality Standards Act (MQSA)