IPA: /ˈpɛp.tɪ.dɪk/
KK: /ˈpɛptɪdɪk/
Relating to or made up of small chains of amino acids, which are the building blocks of proteins.
The scientist studied the peptidic bonds that hold the protein structure together.
Peptidic → It is formed from "peptide" (from Greek "peptidos", meaning digested or assimilated) and the suffix "-ic" (meaning pertaining to). The word "peptidic" refers to something that is related to or characteristic of peptides, which are short chains of amino acids.
Think of 'peptide' as something that is 'related to digestion' ('peptidos') and remember that 'peptidic' means pertaining to peptides.