ALL meanings of dioptres
di·op·ter
D d - noun dioptres Optics. a unit of measure of the refractive power of a lens, having the dimension of the reciprocal of length and a unit equal to the reciprocal of one meter. Abbreviation: D. 1
- noun dioptres an instrument, invented by Hipparchus, to measure the apparent diameter of the sun or moon or to estimate the size or elevation of distant objects. 1
- noun dioptres plural of dioptre. 0