The rare daily word game sweeping the globe. Find what's hidden in plain sight.
BIOTRON
Definition of BIOTRON
noun
A chamber in which the effects of climate on organisms can be studied
Wiktionary · CC BY-SA
Where it comes from
From bio- + -tron.
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.
BIOTRON in OUTLIER
Players have found it on 2 boards so far.
It first turned up on Day 72, 31 July 2026. The most recent board was Day 86, 14 August 2026. Nobody has seen it on a board for 16 days.
First ever to find it
on Day 86, 14 August 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
BIOTRON starts with B and ends with N. Sorted, its letters read BINOORT - the shape to hunt for when the grid is scrambled. O appears more than once.
Words that start BIOTRO
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found BIOTRON?
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