a heavy tool of stone or iron (usually with a flat base and a handle) that is used to grind and mix material (as grain or drugs or pigments) against a slab of stone
a reflective thinker characterized by quiet contemplation
United States geneticist who studied the effects of X-rays on genes (1890-1967)
British philologist (born in Germany) who specialized in Sanskrit (1823-1900)
German mathematician and astronomer (1436-1476)
German physiologist and anatomist (1801-1858)
Swiss physicist who studied superconductivity (born in 1927)
Swiss chemist who synthesized DDT and discovered its use as an insecticide (1899-1965)
