The bond that forms between a new amino acid and the previous one on a polypeptide chain is called a peptide bond.

Here's a breakdown:

* Peptide bond formation: This bond is formed through a dehydration reaction (loss of water) between the carboxyl group (-COOH) of one amino acid and the amino group (-NH2) of the next amino acid.

* Amide linkage: The peptide bond is a type of amide linkage, which is a carbon-nitrogen bond.

* Strong bond: Peptide bonds are strong and relatively stable, which contributes to the stability of proteins.

Let me know if you'd like a more detailed explanation of the process!