trigonometry

/ˌtɹɪɡəˈnɒmətɹi/

//ˌtɹɪɡəˈnɒmətɹi// noun

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

"trigonometry" is a 12-letter English headword indexed on PlainSpell.

The verdict

“trigonometry” has 19 generated spelling variants in the English index at frequency #39,135. The variants make it a useful spelling check.

#39,135
frequency rank, English
3,151
“T” headwords
19
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The branch of mathematics that deals with the relationships between the sides and angles of (in particular) right-angled triangles, as represented by the trigonometric functions, and with calculati...

Corpus desk

Index EN-trigonometry · trigonometry · English

trigonometry · rank #39,135 · 19 variants · 0 confusables

  • FREQ-MID #39,135
  • LEN-MEGA 12 letters
  • VOW-5 5 vowels
  • CONFUS-0 No pairs
  • VAR-HIGH 19 variants
  • BOOK-MID 3,151
  • PHOTO-FINISH trickling

Nearest frequency peer: trickling (-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 “trigonometry”

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

corpus weight

What this shows “trigonometry” 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 trigonometry
PropertyValue
Headwordtrigonometry
LanguageEnglish
Part of speechNoun
IPA/ˌtɹɪɡəˈnɒmətɹi/
Letters12
Frequency rank#39,135
Misspellings tracked19
Confusable pairs0
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “trigonometry”

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

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “trickling” (#39,134), “trimmings” (#39,136), “transitive” (#39,133). Among 3,151 “T” headwords, “trigonometry” is #39,135. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 19 spelling variants around trigonometry (IPA /ˌtɹɪɡəˈnɒmətɹi/), anoun. Corpus frequency is #39,135 among 3,151 “T” headwords. Dominant gloss: "The branch of mathematics that deals with the relationships between the sides and angles of (in particular) right-angled triangles, as represented by the trigonometric functions, and with calculati...".

Our generated misspelling index lists 19 likely wrong-spelling variants for trigonometry, with forms such as "rtigonometry", "tirgonometry", and "trgionometry". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. No confusable counterpart is on file for this word, suggesting its spelling stands apart enough that readers rarely confuse it with something else.

Etymologically, the entry records: PIE word *tréyes From 1610s, from New Latin trigōnometria, from Ancient Greek τρίγωνον (trígōnon, “triangle”) + μέτρον (métron, “measure”), equivalent to trigono- + -metry. The correct English form is trigonometry, spelled T-R-I-G-O-N-O-M-E-T-R-Y.

Definition

  1. 1
    The branch of mathematics that deals with the relationships between the sides and angles of (in particular) right-angled triangles, as represented by the trigonometric functions, and with calculations based on said relationships.

Recorded use

Wiktionary examples

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

  1. Trigonometry emerged in the Hellenistic world during the 3rd century BCE from applications of geometry to astronomy; the Greeks focused on the calculation of chords, while mathematicians in India created the earliest known tables of values for trigonometric functions such as sine.
  2. Historically, trigonometry has been applied in areas such as geodesy, surveying, celestial mechanics and navigation.

Etymology

PIE word *tréyes From 1610s, from New Latin trigōnometria, from Ancient Greek τρίγωνον (trígōnon, “triangle”) + μέτρον (métron, “measure”), equivalent to trigono- + -metry.

Synonyms

trig

This word in other languages

trigonometría(Español)trigonométrie(Français)Trigonometrie(Deutsch)trigonometria(Português)

Common misspellings

Also misspelled as:

  • rtigonometry
  • tirgonometry
  • trgionometry
  • triggonometry
  • trignoometry
  • trigonmoetry
  • trigonnometry
  • trigonoemtry
  • trigonomerty
  • trigonometrry
  • trigonometryy
  • trigonomettry
  • trigonometyr
  • trigonommetry
  • trigonomtery
  • trigoonmetry
  • triognometry
  • trrigonometry
  • ttrigonometry

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of trigonometry - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.

rtigonometry2tirgonometry2trgionometry2triggonometry1trignoometry2trigonmoetry2trigonnometry1trigonoemtry2
Edit distance from "trigonometry"

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 "trigonometry"?
"trigonometry" is spelled T-R-I-G-O-N-O-M-E-T-R-Y. The IPA pronunciation is /ˌtɹɪɡəˈnɒmətɹi/.
What does "trigonometry" mean?
As a noun, "trigonometry" means: The branch of mathematics that deals with the relationships between the sides and angles of (in particular) right-angled triangles, as represented by the trigonometric functions, and with calculati...
What are common misspellings of "trigonometry"?
Common misspellings include "rtigonometry", "tirgonometry", "trgionometry", "triggonometry", "trignoometry". The correct spelling is "trigonometry".
How do you pronounce "trigonometry"?
The IPA (International Phonetic Alphabet) transcription for "trigonometry" is /ˌtɹɪɡəˈnɒmətɹi/. 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 "trigonometry"?
PIE word *tréyes From 1610s, from New Latin trigōnometria, from Ancient Greek τρίγωνον (trígōnon, “triangle”) + μέτρον (métron, “measure”), equivalent to trigono- + -metry. 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 "trigonometry", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 12 letters (nearest by frequency rank).

tranquillity#39,132unaffiliated#39,143unflattering#39,146unstructured#39,150

Similar misspelling depth

Headwords with a similar count of attested misspellings (19 here; floor ≥5).

blackmailing19 variantsinhospitable19 variantsinconspicuous19 variantsintermediates19 variants

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

Source: FrequencyWords open word-frequency list