pygidium
noun
pygidium is spelled P-Y-G-I-D-I-U-M: 8 letters. It appears about once in every 25 million words in written English, the 152,206th most frequent word form (wordfreq, 2021 data). As a noun, pygidium means “The caudal plate of trilobites, crustacea, and certain insects” (English Wiktionary, September 2026). The plural of pygidium is pygidia or pygidiums.
How many letters and syllables are in pygidium?
| Letters | 8: P-Y-G-I-D-I-U-M |
|---|---|
| In writing | about once in every 25 million words; the 152,206th 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 pygidium?
Pygidium appears about once in every 25 million words in written English, the 152,206th 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 pygidium
- pygidia plural
- pygidiums plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does pygidium mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
The caudal plate of trilobites, crustacea, and certain insects.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Pygidium in Spanish, French, German and Portuguese
In the sense The posteriormost portion of certain arthropods:
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 pygidium come from?
Borrowed from New Latin pygidium, By surface analysis, pygo- + -idium.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).