Cations having the structure
R2C=N+. A contraction of alkaniminylium ions. Alkylideneaminylium ions is a synonymous term. A subclass of nitrenium ions.
Source:
PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1344 (https://doi.org/10.1351/pac199567081307)