eikonal
adjective
eikonal is spelled E-I-K-O-N-A-L: 7 letters. It appears about once in every 91 million words in written English, the 305,310th most frequent word form (wordfreq, 2021 data). As an adjective, eikonal means “Describing the properties of a class of partial differential equation encountered in descriptions of wave propagation” (English Wiktionary, September 2026).
How many letters and syllables are in eikonal?
| Letters | 7: E-I-K-O-N-A-L |
|---|---|
| In writing | about once in every 91 million words; the 305,310th 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 eikonal?
Eikonal appears about once in every 91 million words in written English, the 305,310th 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).
What does eikonal mean?
The meanings the English Wiktionary records, quoted as written there (source below).
adjective
- 1
Describing the properties of a class of partial differential equation encountered in descriptions of wave propagation.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Eikonal in Spanish, French, German and Portuguese
In the sense physics and maths term:
| Language | Words |
|---|---|
| Spanish | iconal |
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 eikonal come from?
Ancient Greek εἰκών (eikṓn, “image”).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).