A reddish-brown pigment or compound found in certain algae and photosynthetic organisms that assists in light absorption.
From Greek 'helix' (spiral) and Latin 'ruber' (red), likely named for its color and helical arrangement in the chlorophyll structures of algae.
This pigment is part of nature's antenna system in photosynthetic cells—it captures different wavelengths of light that chlorophyll alone can't use, making algae incredibly efficient at harvesting solar energy!
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