デリス剤ざいMeanings1nounderris compoundA compound derived from derris plants, used as an insecticide or pesticide. Technical term.デリス剤ざいは天てん然ねん由ゆ来らいの殺さっ虫ちゅう剤ざいとして使つかわれることがある。Derris compounds are sometimes used as natural insecticides.