py·​re·​noid pī-ˈrē-ˌnȯid How to pronounce pyrenoid (audio) ˈpī-rə- How to pronounce pyrenoid (audio)
: a protein body in the chloroplasts of algae and hornworts that is involved in carbon fixation and starch formation and storage

Word History


International Scientific Vocabulary, from New Latin pyrena stone of a fruit, from Greek pyrēn; akin to Greek pyros wheat grain, wheat — more at furze

First Known Use

circa 1875, in the meaning defined above

Time Traveler
The first known use of pyrenoid was circa 1875

Dictionary Entries Near pyrenoid

Cite this Entry

“Pyrenoid.” Dictionary, Merriam-Webster, Accessed 22 Jun. 2024.

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