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*Dwsi/qeos), of Colonus, a geometer, to whom Archimedes dedicates his books on the sphere and cylinder, and that on spirals. Censorinus is held to say (100.18), that he improved the octa-eteris of Eudoxus: and both Geminus and Ptolemy made use of the observations of the times of appearance of the fixed stars, which he made in the year B. C. 200. Pliny (Plin. Nat. 18.31) mentions him. (Fabric. Bibl. Graec. vol. iv. p. 15.)

[A. De M.]

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200 BC (1)
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