pyrenoid

[pahy-ree-noid, pahy-ruh-noid]

noun

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

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for pyrenoid

Historical Examples of pyrenoid

A pyrenoid lies in a fold of the chromatophore on the dorsal part.
The Diatomaceae of Philadelphia and Vicinity
Charles Sumner Boyer
The pyrenoid is evidently concerned in the formation of the chromatophore, or in its division.
The Diatomaceae of Philadelphia and Vicinity
Charles Sumner Boyer
Schmitz states that the chromatophore is thickened in the middle and contains a pyrenoid.
The Diatomaceae of Philadelphia and Vicinity
Charles Sumner Boyer

British Dictionary definitions for pyrenoid

pyrenoid

noun

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

Word Origin for pyrenoid

C19: from pyrene ² + -oid

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