Speakur

Word Pronunciation & Dictionary

septillion

/sɛpˈtɪljən/

Word Rarity Very rare

Frequency: Zipf frequency 0.00 in modern English

Syllables
sep-til-lion
IPA
/sɛpˈtɪljən/
12
Scrabble Score
10
Letters
3
Syllables
8
Unique Chars

Meaning

num

A trillion trillion: 1 followed by 24 zeros, 10²⁴.

American usage

num

A billion quintillion: 1 followed by 42 zeros, 10⁴².

Etymology

From French septillion, from sept- (“seven”) + -illion. By surface analysis, sept- + -illion.

Origin

Word Breakdown

Usage

Inflected Forms

septillions (plural)

Derived Forms

septillionaire septillionfold septillionth

Phrases

Previous: sextillion. Next: octillion. yotta-

Frequently Paired Words

Previous: sextillion. Next: octillion. yotta-

Synonyms

1024 1042

Rhymes With

million billion brazilian trillion pavilion gillian jillian maximilian vermilion zillion gazillion castilian

Questions

How do you pronounce septillion?
The recorded pronunciation is /sɛpˈtɪljən/.
What does septillion mean?
A trillion trillion: 1 followed by 24 zeros, 10²⁴.
Where does septillion come from?
It is traced to French.

How to pronounce septillion

  1. Open the pronunciation page — Open the Speakur entry for “septillion”.
  2. Read the phonetic spelling — Read the IPA spelling (/sɛpˈtɪljən/) so you know which sounds to aim for.
  3. Play the audio — Click Play to hear reference audio for “septillion”.
  4. Repeat and practice — Say “septillion” aloud, matching stress and vowels until it feels natural.