endosperm
/ˈɛndəˌspɝm/noun
endosperm is a noun meaning “The tissue surrounding the embryo of flowering plant seeds, that provides nutrition to the developing embryo; usually triploid” (English Wiktionary, September 2026). It is spelled E-N-D-O-S-P-E-R-M and has 3 syllables, and it appears about once in every 11 million words in written English (wordfreq, 2021 data). The plural of endosperm is endosperms.
What does endosperm mean?
noun
- 1
The tissue surrounding the embryo of flowering plant seeds, that provides nutrition to the developing embryo; usually triploid.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How do you pronounce endosperm?
- UK /ˈɛndəˌspɜːm/
- US /ˈɛndəˌspɝm/
- Australia /ˈendəˌspɜːm/
Endosperm has 3 syllables (counted from its American pronunciation in the CMU Pronouncing Dictionary).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-TurtleMedicine-endosperm.wav, Wikimedia Commons (author and licence on each file's page).
Forms of endosperm
- endosperms plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is endosperm?
Endosperm appears about once in every 11 million words in written English, the 98,107th 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).
Endosperm in Spanish, French, German and Portuguese
In the sense tissue:
| Language | Words |
|---|---|
| French | albumen |
| German | Endosperm |
| Portuguese | endosperma |
| Spanish | endosperma |
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.