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One of the minute luminous bodies sometimes visualized in the chromatophores of some protozoa, such as Euglena viridis.
[G. pyrēn, pit of a fruit, + eidos, resemblance]
Farlex Partner Medical Dictionary © Farlex 2012
pyrenoida region of starch formation found in the CHLOROPLASTS of various algae, for example, Spirogyra, Chlamydomonas.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005