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oc·ta·pep·tide | \ ˌäk-tə-ˈpep-ˌtīd 
\
\Definition of octapeptide
: a protein fragment or molecule (such as oxytocin or vasopressin) that consists of eight amino acids linked in a polypeptide chain
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octapeptide
nounoc·ta·pep·tide | \ ˌäk-tə-ˈpep-ˌtīd \
\Medical Definition of octapeptide
: a protein fragment or molecule (as oxytocin or vasopressin) that consists of eight amino acids linked in a polypeptide chain
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