The rare daily word game sweeping the globe. Find what's hidden in plain sight.
SIGMOIDAL
Definition of SIGMOIDAL
adjective
sigmoid; S-shaped.
Wiktionary · CC BY-SA
Where it comes from
From sigmoid + -al.
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.
SIGMOIDAL in OUTLIER
Players have found it on 20 boards so far. 39 players have found it across Outlier's history.
It first turned up on Day 12, 1 June 2026. The most recent board was Day 102, 30 August 2026. It was on the latest finished board.
First ever to find it
on Day 12, 1 June 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
SIGMOIDAL starts with S and ends with L. Sorted, its letters read ADGIILMOS - the shape to hunt for when the grid is scrambled. I 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 SIGMOI
Its neighbours in the OUTLIER dictionary - shortest first.
Also seen on Day 12
Could you have found SIGMOIDAL?
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 12 - and most players walked straight past it.
Play today's OUTLIER