Wiktionary
oligoester
n. (context organic chemistry English) an ester oligomer chain containing a small number of repeating ester units (monomers). (gloss: Oligoesters are short analogs of polymeric polyesters.)
Wikipedia
Oligoester
An oligoester is an ester oligomer chain containing a small number of repeating ester units ( monomers). Oligoesters are short analogs of polymeric polyesters.
An example is oligo-(R)-3-hydroxybutyrate.