diopter
- n a unit of measurement of the refractive power of a lens which is equal to the reciprocal of the focal length measured in meters; used by oculists
dioptre
- n a unit of measurement of the refractive power of a lens which is equal to the reciprocal of the focal length measured in meters; used by oculists
dior
- n French couturier whose first collection in 1947 created a style that became known as the New Look (1905-1957)
diorama
- n a picture (or series of pictures) representing a continuous scene