trigesimal

adj

"trigesimal" is a 10-letter English headword indexed on PlainSpell.

The verdict

“trigesimal” is uncommon English (outside the top frequency list), classed as an adjective. The kind of spelling people second-guess.

Unranked
below top-frequency English
10
letters

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

Corpus desk

Index EN-trigesimal · trigesimal · English

trigesimal · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 10 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "T" thin
  • PHOTO-UNK Peer pending

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.

Key facts for trigesimal
PropertyValue
Headwordtrigesimal
LanguageEnglish
Part of speechAdjective
Letters10
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “trigesimal” in English

trigesimalranks outside the top 100,000 English headwords, in the long tail of specialist, archaic, or seldom-used vocabulary, exactly the territory where a reader stops mid-sentence to double-check spelling.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

trigesimal is uncommon English outside the top frequency list, classed as anadjective. Rarity is why readers land here mid-draft. 2 senses are on record.

Zero misspellings are on record for trigesimal in our index, suggesting the orthography follows predictable English patterns. Our confusable-pair dataset has no match for it, since nothing in our dataset looks or sounds close enough to cause mix-ups.

Etymologically, the entry records: From Latin trigesimus (“thirtieth”) + -al (“forming adjectives”). The correct English form is trigesimal, spelled T-R-I-G-E-S-I-M-A-L.

Definition

  1. 1
    Thirtieth.
  2. 2
    Containing thirty of something.

Recorded use

Wiktionary examples

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

  1. In the trigesimal year of his reign...
  2. Each month is a roughly trigesimal period.

Etymology

From Latin trigesimus (“thirtieth”) + -al (“forming adjectives”).

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "trigesimal"?
"trigesimal" is spelled T-R-I-G-E-S-I-M-A-L.
What does "trigesimal" mean?
As an adjective, "trigesimal" means: Thirtieth.
What is the origin of the word "trigesimal"?
From Latin trigesimus (“thirtieth”) + -al (“forming adjectives”). 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.

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

Source: FrequencyWords open word-frequency list