Compounds having the structure
R2C=NNR2, formally derived from aldehydes or ketones by replacing
=O by
=NNH2 (or substituted analogues).
Source:
PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1341 (https://doi.org/10.1351/pac199567081307)