Word of the Day — April 22, 2026

peptide

/pe-PTID-e/nounPush me

Definition

A tiny protein-building block made when amino acids link together like chain links.

amide combining the amino group of one amino acid with the carboxyl group of another

Memory Hook

PEP-TIDE: Think of amino acids doing the PEP talk before bonding together in a chain, creating a TIDE of linked molecules.