biorationalWiktionary 原文英美构词拆解biobio-前缀rationalrational词干bio-Combining form of life. · Combining form of biological.词源说明From bio- + rational.释义形容词adjective1Of a pesticide or herbicide: having relatively low toxicity, and causing relatively little damage to the environment.名词noun1A pesticide or herbicide that has relatively low toxicity and causes relatively little damage to the