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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

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pyrenoid

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 ● Mar. 1, 2024

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

From Science Daily ● Mar. 1, 2024

B, a single cell treated with chromic acid, and stained with alum cochineal. n, nucleus. py. pyrenoid, × 150.

From Elements of Structural and Systematic Botany For High Schools and Elementary College Courses by Douglas Houghton Campbell

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