English
interpeptide
From inter- + peptide.
Proto-Indo-European *h₁én ‘in’
Proto-Indo-European *h₁entér ‘between’
Proto-Italic *n̥ter ‘between’
Latin inter ‘between’
English inter-
Proto-Indo-European *pékʷ-ye-
…
Ancient Greek πέπτω ‘soften, ripen, boil, cook, bake, digest’
Ancient Greek πεπτόν ‘cooked, digested’
German Pepton
German Peptid
English peptide
Today it means
adj Between peptides.
Language periods are conventional ranges, not dates for this word.
Etymograph / interpeptide