The rare daily word game sweeping the globe. Find what's hidden in plain sight.
CALUTRON
Definition of CALUTRON
noun
A form of mass spectrometer used to separate the isotopes of uranium.
Wiktionary · CC BY-SA
Where it comes from
Coined by Ernest Lawrence from Cal U. (“UC Berkeley”) + -tron.
Etymology via Wiktionary (CC BY-SA).
Word DNA
How it is built
Same root, CALUTRON · 1 relative 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.
CALUTRON in OUTLIER
Players have found it on 6 boards so far.
It first turned up on Day 72, 31 July 2026. The most recent board was Day 139, 6 October 2026. Nobody has seen it on a board for 11 days.
First ever to find it
on Day 88, 16 August 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
CALUTRON starts with C and ends with N. Sorted, its letters read ACLNORTU - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.
Same letters, different word
One other word uses exactly these letters. Worth knowing at the board: an anagram fits a grid the same way.
Could you have found CALUTRON?
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 72 - and most players walked straight past it.
Play today's OUTLIER