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pyrenoid

American

[pahy-ree-noid, pahy-ruh-noid] / paɪˈri nɔɪd, ˈpaɪ rəˌnɔɪd /

noun

a spherical protein structure found within chloroplasts of certain algae and hornworts.

pyrenoid British

/ ˈpaɪrəˌnɔɪd /

noun

any of various small protein granules that occur in certain algae, mosses, and protozoans and are involved in the synthesis of starch

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of pyrenoid

C19: from _pyrene ² + _-oid

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In many algae, Rubisco is densely packed into a microcompartment called the pyrenoid, which plays an important role in the CO2 accumulation in aquatic environments.

From Science Daily

Some of these proteins are apparently involved in pyrenoid construction and CO2 concentration.

From Science Daily

Additional abbreviations: C, carbohydrate; PY, pyrenoid.

From Nature

C, a complete cell. n, nucleus. py. pyrenoid.

From Project Gutenberg

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023