cy.an.o.gen
n.（名词）
A colorless, flammable, pungent, highly poisonous gas, C2N 2, used as a rocket propellant, an insecticide, and a chemical weapon.
氰：一种无色、易燃、有刺激性的剧毒气体，C2N 2，被用作火箭燃料、杀虫剂和化学武器
A univalent radical, CN, found in simple and complex cyanide compounds.
氰基：一种单价基因，氯化苯乙酮，存在于简单的和复杂的氰化物中
