Definition of "orexigenic" [orexigenic]

• That stimulates the appetite. (adjective)

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• "NPY and AgRP stimulate feeding behavior therefore called orexigenic peptides"
• "Research in adult animals by Leibowitz and others has shown that circulating triglycerides stimulate brain chemicals known as orexigenic peptides, which in turn spur the animals to eat more."
• "Accordingly, the orexigenic effect of ghrelin is absent in NPY/AgRP double knockout mice, despite unaltered growth and feeding"