planetesimal
noun, adjective
planetesimal is spelled P-L-A-N-E-T-E-S-I-M-A-L: 12 letters. It appears about once in every 69 million words in written English, the 262,293rd most frequent word form (wordfreq, 2021 data). As a noun, planetesimal means “Any of many small, solid astronomical objects that orbit a star and form protoplanets through mutual gravitational attraction” (English Wiktionary, September 2026). The plural of planetesimal is planetesimals.
How many letters and syllables are in planetesimal?
| Letters | 12: P-L-A-N-E-T-E-S-I-M-A-L |
|---|---|
| In writing | about once in every 69 million words; the 262,293rd 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 planetesimal?
Planetesimal appears about once in every 69 million words in written English, the 262,293rd 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).
Forms of planetesimal
- planetesimals plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does planetesimal mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
Any of many small, solid astronomical objects that orbit a star and form protoplanets through mutual gravitational attraction.
adjective
- 1
Being or relating to one of these astronomical objects.
a planetesimal body
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Planetesimal in Spanish, French, German and Portuguese
In the sense a small, solid astronomical object:
| Language | Words |
|---|---|
| German | Planetesimal |
| Portuguese | planetesimal |
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 planetesimal come from?
Formed from planet by analogy with infinitesimal.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).