Dictionary.com
definitions
  • synonyms

pyrenoid

[pahy-ree-noid, pahy-ruh-noid]
See more synonyms for pyrenoid on Thesaurus.com
noun
  1. a spherical protein structure found within chloroplasts of certain algae and hornworts.
Show More
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for pyrenoid

Historical Examples

  • 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.

  • Schmitz states that the chromatophore is thickened in the middle and contains a pyrenoid.

British Dictionary definitions for pyrenoid

pyrenoid

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

Word Origin

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