The rare daily word game sweeping the globe. Find what's hidden in plain sight.
ESTRADIOL
Definition of ESTRADIOL
noun
A natural estrogenic hormone that is a phenolic alcohol estra-1,3,5-triene-3,17-diol (C18H24O2) secreted chiefly by the ovaries of all vertebrates, that is a major and the most potent of the naturally occurring estrogens; the semisynthetic esterified compound is used medicinally to treat estrogen deficiency and breast cancer.
Wiktionary · CC BY-SA
Where it comes from
Internationalism. From estratriene (“estra(triene)”) + diol. By surface analysis, estra- + di- + -ol.
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.
ESTRADIOL in OUTLIER
Players have found it on 24 boards so far. 32 players have found it across Outlier's history.
It first turned up on Day 34, 23 June 2026. The most recent board was Day 96, 24 August 2026. Nobody has seen it on a board for 1 day.
First ever to find it
on Day 34, 23 June 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
ESTRADIOL starts with E and ends with L. Sorted, its letters read ADEILORST - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.
Same letters, different word
2 other words use exactly these letters. Worth knowing at the board: an anagram fits a grid the same way.
Words that start ESTRAD
Its neighbours in the OUTLIER dictionary - shortest first.
Also seen on Day 34
Could you have found ESTRADIOL?
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 34 - and most players walked straight past it.
Play today's OUTLIER