isocyanide
noun
iso·cy·a·nide
| \ -ˈsī-ə-ˌnīd
\
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Medical Definition of isocyanide
: any of a class of compounds that are isomeric with the normal cyanides, that have the structure RNC, and that are in general colorless volatile poisonous liquids of strong offensive odor
— called also carbylamine, isonitrile