phosphonitrile
/ˌfɒsfə(ʊ)ˈnʌɪtrʌɪl/Chemistry
noun
Any of a class of compounds containing a group PN; a polymeric form of such a compound containing — PN groups.
Origin
1920s; earliest use found in James Partington (1886–1965), chemist and historian of science. From phospho- + nitrile.