phosphazine
1phosphazine — noun The six membered aromatic heterocycle containing four carbon atoms, one nitrogen atom and one phosphorus atom …
2phenophosphazinine — noun A tricyclic heterocycle consisting of two benzene rings fused to phosphazine …
3phosphine — noun a) a toxic gas; hydride of phosphorus, PH b) any alkyl or aryl derivative of this compound, PR (where at least one R is not H) Syn: phosphane, phosp …