pyrenoid


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py·re·noid

 (pī-rē′noid′, pī′rə-)
n.
A proteinaceous structure found within the chloroplast of certain algae and hornwort bryophytes. It is thought to be a site where carbon is concentrated.

[New Latin pȳrēna, fruit stone; see pyrene1 + -oid.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

pyrenoid

(ˈpaɪrəˌnɔɪd)
n
(Biochemistry) any of various small protein granules that occur in certain algae, mosses, and protozoans and are involved in the synthesis of starch
[C19: from pyrene2 + -oid]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
The main characteristics that distinguish members of the order Trentepohliales from other green chlorophycean algae are as follows: differentiated reproductive cells; the presence of [beta]-carotene and haematochrome (i.e., astaxanthin), which color the algal thallus yellow, orange, or red; the absence of a pyrenoid in the chloroplasts; unique flagellar apparatus; and transverse cell walls with plasmodesmata.