phos·pho·ni·um /fɑsˈfoniəm/
phos·pho·ni·um /fɑsˈfonɪəm/ 名詞 磷
Phos·pho·ni·um n. Chem. The hypothetical radical PH4, analogous to ammonium, and regarded as the nucleus of certain derivatives of phosphine. ◄ ►