Dositheus
Δωσίθεος
(Δωσίθεος), 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.)
From William Smith (ed.), Dictionary of Greek and Roman Biography and Mythology. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.