| secondary structure [`sek·ǝn´der·ē `strǝk·chǝr] BIOCHEMISTRY The conformation of a protein or peptide molecule with respect to nearest-neighbor amino acids. GEOLOGY A structure such as a fault, fold, or joint resulting from tectonic movement that started after the rock in which it is found was emplaced. PALEONTOLOGY A coarse structure usually between the thin sheets in the protective wall of a tintinnid. |