02/05/2019 8:26:00 02/05/2019 8:26:00 Defmean 02/05/2019 8:26:00 Msh Msh Msh Share on What is Msh?Msh definition and meaning on Dictionary terms:Also called melanocyte-stimulating hormone, melanotropin. Biochemistry. a hormone, produced in vertebrates by the pituitary gland, that causes dispersal of the black pigment melanin of melanocytes. Mineralogy. Mohs scale.