single-strand chain

in a polymer
https://doi.org/10.1351/goldbook.S05692
A @C00946@ that comprises @C01288@ connected in such a way that adjacent constitutional units are joined to each other through two atoms, one on each @C01288@.
Source:
PAC, 1996, 68, 2287. (Glossary of basic terms in polymer science (IUPAC Recommendations 1996)) on page 2294 [Terms] [Paper]