"short chain of amino acids linked by amide bonds," 1906, from German peptid (1902); see peptone + -ide, here probably indicating a derivative. Related: Peptidic.
Entries linking to peptide
a general name for a substance into which the nitrogenous elements of food are converted by digestion, 1860, from German Pepton (1849), from Greek pepton, neuter of peptos "cooked, digested," verbal adjective of peptein "to cook" (from PIE root *pekw- "to cook, ripen"). Related: Peptonic.
Proto-Indo-European root meaning "to cook, ripen."
It forms all or part of: apricot; biscuit; charcuterie; concoct; concoction; cook; cuisine; culinary; decoct; decoction; drupe; dyspepsia; dyspeptic; eupeptic; kiln; kitchen; peptic; peptide; peptone; precocious; pumpkin; ricotta; terra-cotta.
It is the hypothetical source of/evidence for its existence is provided by: Sanskrit pakvah "cooked, ripe;" Avestan -paka- "cooked;" Greek peptein "to cook, ripen, digest," pepon "ripe;" Latin coquere "to cook, prepare food, ripen, digest, turn over in the mind," Oscan popina "kitchen;" Lithuanian kepti "to bake, roast;" Old Church Slavonic pecenu "roasted;" Welsh poeth "cooked, baked, hot."