A hormone secreted by the anterior pituitary gland that controls the degree of pigmentation in melanocytes WordNet 3.0 & Open English WordNet

The melanocyte-stimulating hormones, known collectively as MSH, also known as melanotropins or intermedins, are a family of peptide hormones and neuropeptides consisting of α-melanocyte-stimulating hormone, β-melanocyte-stimulating hormone, and γ-melanocyte-stimulating hormone that are produced by cells in the pars intermedia of the anterior lobe of the pituitary gland. Wikipedia

A hormone produced in the pituitary gland, and related to skin pigmentation Wikipedia Disambiguation

Group of peptide hormones in Homo sapiens Wikidata

Any of a class of peptide hormones released by the pituitary gland that are involved in regulating the production of melanin. Wiktionary