DIOPTER as NOUN

1. Meaning
   • a unit of measurement of the refractive power of a lens which is equal to the reciprocal of the focal length measured in meters
   Hypernyms(s) diopter is a kind of… Example: animal is a hypernym of mammal, plant is a hypernym of flower
   • unit of measurement (what does unit of measurement mean?)
   • unit (what does unit mean?)