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peptide Definition
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peptide
noun(pep-tide)any of various amides that are derived from two or more amino acids by combination of the amino group of one acid with the carboxyl group of another and are usually obtained by partial hydrolysis of proteins
peptide
noun(pep-tide)the chemical bond between carbon and nitrogen in a peptide linkage
peptide
noun(pep-tide)the divalent group CONH that unites the amino acid residues in a peptide
peptide
noun(pep-tide)a peptide hormone secreted by the cardiac atria that in pharmacological doses promotes salt and water excretion and lowers blood pressure —called also atrial natriuretic factor
peptide
noun(pep-tide)beta-amyloid
peptide
noun(pep-tide)an amyloid that is derived from a larger precursor protein and is the primary component of plaques characteristic of Alzheimer's disease—called also A-beta, amyloid beta, amyloid beta peptide, amyloid beta protein
peptide
noun(pep-tide)any of a group of endogenous neural polypeptides (such as an endorphin or enkephalin) that bind especially to opiate receptors and mimic some of the pharmacological properties of opiates —called also opioid peptide
peptide
noun(pep-tide)a synthetic drug possessing narcotic properties similar to opiates but not derived from opium; broadly : opiate