estradiol

/ˌɛs.tɹəˈdaɪˌɔl/

//ˌɛs.tɹəˈdaɪˌɔl// noun

By · According to Wiktionary data (CC BY-SA) ·

"estradiol" is a 9-letter English headword indexed on PlainSpell.

The verdict

“estradiol” has 13 generated spelling variants in the English index at frequency #40,236. The variants make it a useful spelling check.

#40,236
frequency rank, English
2,246
“E” headwords
13
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - 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 natura...

Corpus desk

Index EN-estradiol · estradiol · English

estradiol · rank #40,236 · 13 variants · 0 confusables

  • FREQ-MID #40,236
  • LEN-LONG 9 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-HIGH 13 variants
  • BOOK-MID 2,246
  • PHOTO-FINISH especial

Nearest frequency peer: especial (-1 rank slots)

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Rank peers near misspelling magnet “estradiol”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “estradiol” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for estradiol
PropertyValue
Headwordestradiol
LanguageEnglish
Part of speechNoun
IPA/ˌɛs.tɹəˈdaɪˌɔl/
Letters9
Frequency rank#40,236
Misspellings tracked13
Confusable pairs0
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “estradiol”

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).estradiollands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Same rarity band neighbours include “especial” (#40,235), “exemplify” (#40,237), “ergonomic” (#40,234). Among 2,246 “E” headwords, “estradiol” is #40,236. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 13 spelling variants around estradiol (IPA /ˌɛs.tɹəˈdaɪˌɔl/), anoun. Corpus frequency is #40,236 among 2,246 “E” headwords. Dominant gloss: "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 natura...".

Our generated misspelling index lists 13 likely wrong-spelling variants for estradiol, with forms such as "esrtadiol", "esstradiol", and "estardiol". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. It is not paired with a close-neighbour confusable in our dataset, since nothing in our dataset looks or sounds close enough to cause mix-ups.

Etymologically, the entry records: Internationalism. From estratriene (“estra(triene)”) + diol. By surface analysis, estra- + di- + -ol. The correct English form is estradiol, spelled E-S-T-R-A-D-I-O-L.

Definition

  1. 1
    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.

Recorded use

Wiktionary example

These source excerpts show how estradiol appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. Gender-affirming hormone therapy may involve testosterone for trans people assigned female at birth (AFAB) and estradiol and anti-androgens for trans people AMAB.

Etymology

Internationalism. From estratriene (“estra(triene)”) + diol. By surface analysis, estra- + di- + -ol.

This word in other languages

estradiol(Français)

Common misspellings

Also misspelled as:

  • esrtadiol
  • esstradiol
  • estardiol
  • estraddiol
  • estradilo
  • estradioll
  • estradoil
  • estraidol
  • estrdaiol
  • estrradiol
  • esttradiol
  • etsradiol
  • setradiol

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of estradiol - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.

esrtadiol2esstradiol1estardiol2estraddiol1estradilo2estradioll1estradoil2estraidol2
Edit distance from "estradiol"

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "estradiol"?
"estradiol" is spelled E-S-T-R-A-D-I-O-L. The IPA pronunciation is /ˌɛs.tɹəˈdaɪˌɔl/.
What does "estradiol" mean?
As a noun, "estradiol" means: 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 natura...
What are common misspellings of "estradiol"?
Common misspellings include "esrtadiol", "esstradiol", "estardiol", "estraddiol", "estradilo". The correct spelling is "estradiol".
How do you pronounce "estradiol"?
The IPA (International Phonetic Alphabet) transcription for "estradiol" is /ˌɛs.tɹəˈdaɪˌɔl/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "estradiol"?
Internationalism. From estratriene (“estra(triene)”) + diol. By surface analysis, estra- + di- + -ol. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "estradiol", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 9 letters (nearest by frequency rank).

exemplify#40,237ergonomic#40,234fattening#40,239endoscopy#40,231

Similar misspelling depth

Headwords with a similar count of attested misspellings (13 here; floor ≥5).

Eindhoven13 variantsflinging13 variantsdockyard13 variantsGateshead13 variants

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list