The rare daily word game sweeping the globe. Find what's hidden in plain sight.
SPLENIUM
Definition of SPLENIUM
noun
The thick posterior part of the corpus callosum of the brain.
Wiktionary · CC BY-SA
Where it comes from
Borrowed from Latin splēnium (“plaster, patch”), from Ancient Greek σπληνῐ́ον (splēnĭ́on, “pad or compress of linen”).
Etymology via Wiktionary (CC BY-SA).
Word DNA
Line of descent
- Ancient Greek
- Latin
- English
2 recorded generations before English.
Deepest traced root
2nd
of 58 source languages in OUTLIER
12.6%
of traced words share this origin (3,666)
branch · 12.6% of traced words
How it is built
OUTLIER scores every word on how unusual it is, and that number is not published. Working it out at the board is the game.
SPLENIUM in OUTLIER
Players have found it on 6 boards so far.
It first turned up on Day 64, 23 July 2026. The most recent board was Day 122, 19 September 2026. Nobody has seen it on a board for 24 days.
First ever to find it
on Day 64, 23 July 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
SPLENIUM starts with S and ends with M. Sorted, its letters read EILMNPSU - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.
Words that start SPLENI
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found SPLENIUM?
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 64 - and most players walked straight past it.
Play today's OUTLIER