Celsus, Aulus Cornelius, fl. A.D. 14, Latin encyclopedist. His only extant work, De re medicina, consists of eight books on medicine believed to have been written c.A.D. 30. He was not esteemed as a scientist in his time, but his was one of the first works to be rediscovered and printed (Florence, 1478) during the Renaissance and was very influential, largely because of its splendid Latin style. It was translated by James Grieve in 1756 and by W. G. Spencer in 1935. Celsus' first name is also written Aurelius.
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