The rare daily word game sweeping the globe. Find what's hidden in plain sight.
LUMINOL
Definition of LUMINOL
noun
The compound 5-amino-2,3-dihydro-1,4-phthalazinedione, which exhibits blue chemiluminescence when mixed with an appropriate oxidizing agent.
Wiktionary · CC BY-SA
Where it comes from
First use appears in 1934 in a paper by E. Huntress, L. Stanley, and A. Parker. The verbal form first appears c. 1997, although the exact date of its first appearance is uncertain.
Etymology via Wiktionary (CC BY-SA).
Word DNA
How it is built
OUTLIER scores every word on how unusual it is, and that number is not published. Working it out at the board is the game.
LUMINOL in OUTLIER
Players have found it on 1 board so far.
It first turned up on Day 167, 3 November 2026. Nobody has seen it on a board for 10 days.
First ever to find it
on Day 167, 3 November 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
LUMINOL starts with L and ends with L. Sorted, its letters read ILLMNOU - the shape to hunt for when the grid is scrambled. L appears more than once.
Same letters, different word
One other word uses exactly these letters. Worth knowing at the board: an anagram fits a grid the same way.
Words that start LUMINO
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found LUMINOL?
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 167 - and most players walked straight past it.
Play today's OUTLIER