https://doi.org/10.1351/goldbook.O04286
A molecule of intermediate
relative molecular mass
, the structure of which essentially comprises a small plurality of units derived, actually or conceptually, from molecules of lower
relative molecular mass
.
Notes:
  1. A molecule is regarded as having an intermediate
    relative molecular mass
    if it has properties which do vary significantly with the removal of one or a few of the units.
  2. If a part or the whole of the molecule has an intermediate
    relative molecular mass
    and essentially comprises a small plurality of units derived, actually or conceptually, from molecules of lower
    relative molecular mass
    , it may be described as oligomeric, or by
    oligomer
    used adjectivally.
Source:
PAC, 1996, 68, 2287. (Glossary of basic terms in polymer science (IUPAC Recommendations 1996)) on page 2289 [Terms] [Paper]