Referring to nerve cells or fibres that are believed to employ small peptide molecules as their neurotransmitter. ... Origin: peptide + G. Ergon, work ... (05 Mar 2000) ... 
(pep″tĭ-dur´jīk) of or pertaining to neurons that secrete peptide hormones.
Type: Term Pronunciation: pep′ti-der′jik Definitions: 1. Referring to nerve cells or fibers that are believed to use small peptide molecules as their neurotransmitter.