pendant group (side group)

https://doi.org/10.1351/goldbook.P04472
An offshoot, neither @O04286@ nor @M03667@ from a @C00946@.
Source:
PAC, 1996, 68, 2287. (Glossary of basic terms in polymer science (IUPAC Recommendations 1996)) on page 2297 [Terms] [Paper]