Merriam-Webster Collegiate Dictionary - muller

 I. biographical name  (Friedrich) Max 1823-1900 British (German-born) philologist  II. biographical name Johann 1436-1476 Regiomontanus German astronomer  III. biographical name Karl Alexander 1927- Swiss physicist  IV. biographical name Paul Hermann 1899-1965 Swiss chemist MULLER  biographical name Hermann Joseph 1890-1967 American geneticist MULLER  noun  Etymology: alteration of Middle English molour, probably from mullen to grind  Date: 1612 a stone or piece of wood, metal, or glass used as a pestle for pounding or grinding