pyrenoid

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

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. 2019

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British Dictionary definitions for pyrenoid

pyrenoid

/ (ˈpaɪrəˌnɔɪd) /

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