The rare daily word game sweeping the globe. Find what's hidden in plain sight.
ACTINOMETRY
Definition of ACTINOMETRY
noun
the measurement of the heating power of electromagnetic radiation, especially that of solar radiation
Wiktionary · CC BY-SA
Where it comes from
From actino- + -metry.
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.
ACTINOMETRY in OUTLIER
Players have found it on 1 board so far.
It first turned up on Day 120, 17 September 2026. It was on the latest finished board.
First ever to find it
on Day 120, 17 September 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
ACTINOMETRY starts with A and ends with Y. Sorted, its letters read ACEIMNORTTY - the shape to hunt for when the grid is scrambled. T appears more than once.
Words that start ACTINOM
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found ACTINOMETRY?
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 120 - and most players walked straight past it.
Play today's OUTLIER