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pyrenoid

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py⋅re⋅noid

[pahy-ree-noid, pahy-ruh-noid]
–noun
a spherical protein structure found within chloroplasts of certain algae and hornworts.
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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py·re·noid   (pī-rē'noid', pī'rə-)   
n.  A proteinaceous structure found within the chloroplast of certain algae and bryophytes. It is considered to be associated with starch deposition.

[New Latin pȳrēna, fruit stone; see pyrene + -oid.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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