noun🔗ShareA unit of measure of the power of a lens or mirror, equal to the reciprocal of its focal length in meters. Myopia is diagnosed and measured in diopters."The eye doctor said my daughter's prescription changed, and she now needs glasses with a -1.5 diopter correction for nearsightedness. "medicinephysicstechnicalunitscienceChat with AIVocabulary GamePractice Reading
noun🔗ShareThe dioptre adjustment mechanism of a pair of binoculars."I adjusted the diopter on my binoculars to get a clear view of the bird. "devicetechnologypartChat with AIVocabulary GamePractice Reading
noun🔗ShareAny lens system, such as a telescope."The astronomer used a powerful diopter to observe the distant star. "technologyphysicsdevicescienceChat with AIVocabulary GamePractice Reading
noun🔗ShareA theodolite or similar surveyor’s angle measuring device."The surveyor used a diopter to carefully measure the angles of the property lines. "technologydevicetechnicalChat with AIVocabulary GamePractice Reading
noun🔗ShareAn alidade."The surveyor carefully aligned the diopter (alidade) on the plane table to sight the distant landmark. "technicaldevicescienceChat with AIVocabulary GamePractice Reading
noun🔗ShareA surgical speculum."The doctor used a diopter to gently open the patient's nostril and examine the inside. "medicinedeviceChat with AIVocabulary GamePractice Reading
noun🔗ShareAn instrument for drawing the skull by projections."The anthropologist used a diopter to create precise drawings of the ancient skull fragments, aiding in the reconstruction of the individual's face. "medicinedeviceanatomyChat with AIVocabulary GamePractice Reading
