The rare daily word game sweeping the globe. Find what's hidden in plain sight.
LEUCO
Definition of LEUCO
adjective
Of or relating to leuco dyes and their related compounds.
Wiktionary · CC BY-SA
Where it comes from
From Ancient Greek λευκός (leukós, “white”).
Etymology via Wiktionary (CC BY-SA).
OUTLIER scores every word on how unusual it is, and that number is not published. Working it out at the board is the game.
LEUCO in OUTLIER
Players have found it on 5 boards so far.
It first turned up on Day 44, 3 July 2026. The most recent board was Day 116, 13 September 2026. Nobody has seen it on a board for 4 days.
First ever to find it
on Day 44, 3 July 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
LEUCO starts with L and ends with O. Sorted, its letters read CELOU - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.
Words that start LEUCO
Its neighbours in the OUTLIER dictionary - shortest first.
Also seen on Day 44
Could you have found LEUCO?
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 44 - and most players walked straight past it.
Play today's OUTLIER