A nonmetallic element(P; at. no. 15; at. wt. 30.9737), a yellowish, waxy, poisonous substance with an unpleasant odor, luminous and highly inflammable, used in rat poison, match tips, etc.

【化】磷(元素符号 P；原子序 15；原子量 30.9737)；黄磷；赤鳞；磷(用以毒鼠、制火柴等)。