The rare daily word game sweeping the globe. Find what's hidden in plain sight.
LUCIFERIN
Definition of LUCIFERIN
noun
Any of a class of polycyclic heterocycles that are responsible for the bioluminescence of fireflies, being converted to oxyluciferin by luciferase in the process.
Wiktionary · CC BY-SA
Where it comes from
From Latin lūcifer (“light bringer”) + English -in.
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.
LUCIFERIN in OUTLIER
Players have found it on 6 boards so far.
It first turned up on Day 80, 8 August 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 80, 8 August 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
LUCIFERIN starts with L and ends with N. Sorted, its letters read CEFIILNRU - the shape to hunt for when the grid is scrambled. I appears more than once.
Words that start LUCIFE
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found LUCIFERIN?
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 80 - and most players walked straight past it.
Play today's OUTLIER