泊松 Traditional form: 泊松 Pinyin (reading): Bósōng Definitions: S.D. Poisson (1781-1840), French mathematician also pr. ( Pōsōng) Characters: 泊 - to anchor; to moor 松 - pine tree; fir tree Traditional characters: 泊 - to anchor; to moor 松 - pine tree; fir tree