alkyl radicals

https://doi.org/10.1351/goldbook.A00235
Carbon-centered radicals derived formally by removal of one hydrogen atom from an alkane, e.g. CH3CH2C.H2 propyl.
Source:
PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1314 (https://doi.org/10.1351/pac199567081307)