The ion PH4 +, analogous to ammonium; a substituted form of this. Usually attributive or as a formative element in chemical names.

Any substituted derivative of PH3, analogous to an amine.

Any of a class of compounds containing a group  P≡N; a polymeric form of such a compound containing — P=N— groups. Cf. phosphazene, n.

A (hypothetical) hydride of pentavalent phosphorus, PH5; any of a series of (real) compounds regarded as substituted derivatives of this.

An organophosphorus compound, PO(N(CH2)2)3, used as an insect sterilant and formerly in the treatment of cancer.

a substance, esp. a glass, which consists largely of phosphorus and silicon oxides, or is both a phosphate and a silicate; frequently attributive.