1635-1703. English scientist and inventor, originator of Hooke's law, and considered the foremost mechanic of his time. His inventions included a telegraph system, the spirit-level, marine barometer, and sea gauge. He coined the term `cell' in biology. Hooke studied elasticity, furthered the sciences of mechanics and microscopy, and helped improve such scientific instruments as watches, microscopes, telescopes, and barometers. He was elected to the Royal Society 1663, and became its curator for the rest of his life. He was professor of geometry at Gresham College, London, and designed several buildings, including the College of Physicians, London.