¹ Source: wiktionary.com
Medical Definition of Dioptra
1. An optical instrument, invented by Hipparchus, for taking altitudes, leveling, etc. Origin: L. Dioptra, fr. Gr. See Dioptric. Source: Websters Dictionary (01 Mar 1998)
¹ Source: wiktionary.com
1. An optical instrument, invented by Hipparchus, for taking altitudes, leveling, etc. Origin: L. Dioptra, fr. Gr. See Dioptric. Source: Websters Dictionary (01 Mar 1998)