dĭoptra
            
          
          dĭoptra, ae, f., = δίοπτρα, an optical instrument to measure the height of places, Vitr. 8, 6; for measuring the sun's shadow, Plin. 2, 69, 69, § 176.
          {
  "content": "dĭoptra, ae, f., = δίοπτρα, an optical instrument to measure the height of places, Vitr. 8, 6; for measuring the sun's shadow, Plin. 2, 69, 69, § 176.\n",
  "key": "dioptra",
  "type": "greek"
}