oligopeptide

noun
oli·​go·​pep·​tide | \ ˌäl-i-gō-ˈpep-ˌtīd How to pronounce oligopeptide (audio) , ˌō-li- How to pronounce oligopeptide (audio) \

Medical Definition of oligopeptide

: a protein fragment or molecule that usually consists of less than 25 amino acid residues linked in a polypeptide chain