Univalent groups formed by removing a hydrogen atom from a @H02889@, e.g. ethyl, phenyl.
See:
heterocyclyl
,
organoheteryl
,
organyl groups
Source: PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1341 [Terms] [Paper]