tertial

/ˈtɝʃl̩/

//ˈtɝʃl̩// noun

"tertial" is a 7-letter English headword indexed on PlainSpell.

The verdict

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

Unranked
below top-frequency English
7
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Any flight feather attached to the humerus (upper arm) of a bird.

Corpus desk

Index EN-tertial · tertial · English

tertial · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 7 letters
  • VOW-3 3 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 tertial
PropertyValue
Headwordtertial
LanguageEnglish
Part of speechNoun
IPA/ˈtɝʃl̩/
Letters7
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “tertial” in English

tertialsits beyond the 100,000 most-frequent English words, in the long tail of technical, archaic, or otherwise rare vocabulary where spelling doubt tends to strike hardest.

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

Rare enough to double-check

tertial is uncommon English outside the top frequency list, classed as anoun, transcribed /ˈtɝʃl̩/. Rarity is why readers land here mid-draft. Gloss: "Any flight feather attached to the humerus (upper arm) of a bird.".

No misspelling variants are generated for tertial in our index, which points to an orthography that plays by predictable English rules. This headword has no recorded confusable partner, since its spelling is unusual enough that it doesn't cluster with a lookalike.

Etymologically, the entry records: From Latin tertius (“third”); the tertial feathers are the third row of feathers. By surface analysis, terti- + -al. The correct English form is tertial, spelled T-E-R-T-I-A-L.

Definition

  1. 1
    Any flight feather attached to the humerus (upper arm) of a bird.

Recorded use

Wiktionary example

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

  1. He continues — "There was the same rear up, with the head bent down, followed by an upjerk of the hind parts; the long sickle-shaped tertials, so noticeable in this species, seemed little if at all expanded, […]

Etymology

From Latin tertius (“third”); the tertial feathers are the third row of feathers. By surface analysis, terti- + -al.

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 "tertial"?
"tertial" is spelled T-E-R-T-I-A-L. The IPA pronunciation is /ˈtɝʃl̩/.
What does "tertial" mean?
As a noun, "tertial" means: Any flight feather attached to the humerus (upper arm) of a bird.
How do you pronounce "tertial"?
The IPA (International Phonetic Alphabet) transcription for "tertial" is /ˈtɝʃl̩/. 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 "tertial"?
From Latin tertius (“third”); the tertial feathers are the third row of feathers. By surface analysis, terti- + -al. 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