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 May 6, 2026) - Thirtieth.

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

Where “trigesimal” sits in English frequency

trigesimal falls outside the top-100,000 ranked English words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

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.

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.

Using “trigesimal”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is T-R-I-G-E-S-I-M-A-L - every other letter order is a misspelling in standard orthography.
  • Browse more English words and confusable pairs in the same reference. English words
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

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

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list