cyclopeptide

<chemistry> A polypeptide lacking terminal -NH2 and -COOH groups by virtue of their combination to form another peptide link, forming a ring. ... (05 Mar 2000) ...
Found on http://www.encyclo.co.uk/local/20973

cyclopeptide

Type: Term Pronunciation: sī′klō-pep′tīd Definitions: 1. One of a group of cyclic peptides that inhibit RNA polymerase and thus block protein synthesis. Used as topical antimicrobials, but toxic if ingested. Constituent in mushrooms that causes toxicity (amatoxin).
Found on http://www.medilexicon.com/medicaldictionary.php?t=22262
No exact match found