Dioptre
7 lettersnounrareUpdated June 2026
Definition
The British spelling of diopter, a unit measuring the refractive power of a lens equal to the reciprocal of the focal length in metres.
“The optician noted that her right eye required a correction of one dioptre.”
Pronunciation
Syllables
di·op·tre
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Synonyms
Word Game Tips
Wordle
British spelling ending in RE rather than ER - contains OPT as a hidden cluster
Scrabble
P is worth 3 points - slightly more common in British Scrabble dictionaries than the ER form
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