dex

noun

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

"dex" is a 3-letter English headword indexed on PlainSpell.

The verdict

“dex” sits in 20 confusable pairs (corpus #20,608) as a noun. The look-alike neighbours are the real trap.

#20,608
frequency rank, English
3,470
“D” headwords
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - An order or factor of ten.

Corpus desk

Index EN-dex · dex · English

dex · rank #20,608 · 0 variants · 20 confusables

  • FREQ-MID #20,608
  • LEN-MID 3 letters
  • VOW-1 1 vowel
  • CONFUS-HIGH 20 pairs
  • VAR-0 0 variants
  • BOOK-MID 3,470
  • PHOTO-FINISH detriment

Nearest frequency peer: detriment (-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.

Frequency neighbours of confusable “dex”

Peers at similar corpus weight, separate from look-alike pairs below

corpus weight

What this shows Bars place “dex” against nearest ranked English headwords, not a reprint of the confusable-pair desk.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

dex vs do
33% similar
dex vs Dr
0% similar
dex vs di
33% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for dex
PropertyValue
Headworddex
LanguageEnglish
Part of speechNoun
Letters3
Frequency rank#20,608
Misspellings tracked0
Confusable pairs20
SourceWiktionary (kaikki.org)

Corpus rank beside confusables of “dex”

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).dexlands here:

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “detriment” (#20,607), “DHS” (#20,609), “dialects” (#20,610). Among 3,470 “D” headwords, “dex” is #20,608. Source: FrequencyWords open word-frequency list.

Easy to mix with look-alikes

The spelling risk for dex is neighbouring look-alikes ("do", "Dr", …), not just typos; it is anoun. Frequency #20,608 among 3,470 “D” headwords. Gloss: "An order or factor of ten.".

The misspelling generator found no plausible variants for dex, suggesting the orthography follows predictable English patterns. It also participates in 20 confusable-pair relationships, "do", "Dr", "di", and more, where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: Contraction of decimal exponent. The correct English form is dex, spelled D-E-X.

Definition

  1. 1
    An order or factor of ten.

Recorded use

Wiktionary example

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

  1. 2004, Cartledge et al 2004, The Homogeneity of Interstellar Oxygen in the Galactic Disk, Abstract, The Astrophysical Journal, Volume 613, Issue 2, pp. 1037-1048, The data points for low-<nH> paths are scattered more widely than those for denser sight lines, because O/H ratios for such paths shorter than 800 pc are generally about 0.10 dex lower than the v…

Etymology

Contraction of decimal exponent.

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 "dex"?
"dex" is spelled D-E-X.
What does "dex" mean?
As a noun, "dex" means: An order or factor of ten.
What words are commonly confused with "dex"?
"dex" is commonly confused with "do", "Dr", "di". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
What is the origin of the word "dex"?
Contraction of decimal exponent. 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 "dex", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 3 letters (nearest by frequency rank).

DHS#20,609fad#20,634BCS#20,566ips#20,676

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

Source: FrequencyWords open word-frequency list