heptagonal
/hɛpˈtæɡənəl/adjective
heptagonal is spelled H-E-P-T-A-G-O-N-A-L: 10 letters. It appears about once in every 62 million words in written English, the 246,401st most frequent word form (wordfreq, 2021 data). As an adjective, heptagonal means “Having seven angles and sides” (English Wiktionary, September 2026).
How many letters and syllables are in heptagonal?
| Letters | 10: H-E-P-T-A-G-O-N-A-L |
|---|---|
| In writing | about once in every 62 million words; the 246,401st most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is heptagonal?
Heptagonal appears about once in every 62 million words in written English, the 246,401st most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce heptagonal?
- /hɛpˈtæɡənəl/
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: En-ca-heptagonal.oga, Wikimedia Commons (author and licence on each file's page).
What does heptagonal mean?
The meanings the English Wiktionary records, quoted as written there (source below).
adjective
- 1
Having seven angles and sides.
- 2
Belonging to the sequence generated by the formula (5n²-3n)/2.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Heptagonal in Spanish, French, German and Portuguese
In the sense Having seven angles and sides:
| Language | Words |
|---|---|
| French | heptagone, heptagonal |
| German | siebeneckig |
| Portuguese | heptagonal, heptágono |
| Spanish | heptagonal, heptágono |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does heptagonal come from?
Since 16th century, from heptagon + -al.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).