Bot. a small structure within a chloroplast, as in some algae, functioning as a center for starch production
Origin of pyrenoid; from Classical Greek pyrēn (gen. pyrēnos), pyrene + -oid
A proteinaceous structure found within the chloroplast of certain algae and hornwort bryophytes. It is thought to be a site where carbon is concentrated.
Origin of pyrenoidNew Latin p&ymacron;rēna, fruit stone; see pyrene1 + –oid.