Dosi'theus
(
*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.]