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.

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

From Science Daily • Mar. 1, 2024

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

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

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

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 Campbell, Douglas Houghton

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