The rare daily word game sweeping the globe. Find what's hidden in plain sight.
DIOPTER
Definition of DIOPTER
noun
A 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.
Wiktionary · CC BY-SA
Where it comes from
From Latin dioptra, from Ancient Greek διόπτρα (dióptra). (Can this etymology be sourced? Particularly: “link's dead now”)
Etymology via Wiktionary (CC BY-SA).
Word DNA
Line of descent
- Ancient Greek
- Latin
- English
2 recorded generations before English.
Deepest traced root
3rd
of 59 source languages in OUTLIER
12.2%
of traced words share this origin (9,477)
branch · 12.2% of traced words
How it is built
Same root, DIOPTER · 3 relatives in the game
OUTLIER scores every word on how unusual it is, and that number is not published. Working it out at the board is the game.
DIOPTER in OUTLIER
Players have found it on 48 boards so far. 119 players have found it across Outlier's history.
It first turned up on Day 24, 13 June 2026. The most recent board was Day 155, 22 October 2026. It was on the latest finished board.
First found by a player on Day 24, 13 June 2026.
Built from these letters
DIOPTER starts with D and ends with R. Sorted, its letters read DEIOPRT - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.
Same letters, different word
4 other words use exactly these letters. Worth knowing at the board: an anagram fits a grid the same way.
Also seen on Day 24
Could you have found DIOPTER?
OUTLIER is a daily word game. One grid, the same grid for everybody, and the words nobody else spots are the ones that pay. This word was on Day 24 - and most players walked straight past it.
Play today's OUTLIER