noun Chemistry.
a polymer molecule consisting of a small number of monomers.
Compare dimer, tetramer, trimer.

1965–70; oligo- + -mer

oligomeric [uh-lig-uh-mer-ik] , adjective
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World English Dictionary
oligomer (ɒˈlɪɡəmə)
polymer Compare copolymer a compound of relatively low molecular weight containing up to five monomer units
[C20: from oligo- + -mer, as in polymer]

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American Heritage
Science Dictionary
oligomer   (ə-lĭg'ə-mər)  Pronunciation Key 
A molecule that consists of a relatively small and specifiable number of monomers (usually less than five). Unlike a polymer, if one of the monomers is removed from an oligomer, its chemical properties are altered.
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