propenenitrile
/ˌprəʊpiːnˈnʌɪtrʌɪl/(also propenitrile, propenonitrile) Chemistry
noun
= acrylonitrile.
Origin
1960s. In some forms from propene + nitrile; the form propenitrile shows elision of the medial syllable. In some forms from propene + -o- + nitrile.