arachnoid
/əˈɹæk.nɔɪd/adjective, noun
arachnoid is spelled A-R-A-C-H-N-O-I-D: 9 letters. It appears about once in every 15 million words in written English, the 118,441st most frequent word form (wordfreq, 2021 data). As an adjective, arachnoid means “Relating to or resembling spider webs; covered with or composed of soft loose hairs or fibers” (English Wiktionary, September 2026).
How many letters and syllables are in arachnoid?
| Letters | 9: A-R-A-C-H-N-O-I-D |
|---|---|
| In writing | about once in every 15 million words; the 118,441st 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 arachnoid?
Arachnoid appears about once in every 15 million words in written English, the 118,441st 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 arachnoid?
- /əˈɹæk.nɔɪd/
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Forms of arachnoid
- arachnoids plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does arachnoid mean?
The meanings the English Wiktionary records, quoted as written there (source below).
adjective
- 1
Relating to or resembling spider webs; covered with or composed of soft loose hairs or fibers.
- 2
Relating to the arachnoid mater.
- 3
Relating to or resembling spiders.
noun
- 1
Ellipsis of arachnoid mater.
- 2
A round network of fractures in the crust of Venus.
- 3
An arachnid.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Where does arachnoid come from?
Mid 18th century borrowing from New Latin arachnoīdēs, from Ancient Greek ᾰ̓ρᾰχνοειδής (ărăkhnoeidḗs, “like a cobweb”), from ᾰ̓ρᾰ́χνη (ărắkhnē, “spider web”) + -ο- (-o-) + -ειδής (-eidḗs, “-oid, -like”). By surface analysis, arachn- + -oid.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).