Definitions

1. noun

A yellow pigment found in algae and cyanobacteria that helps protect them from excessive light.

“The zooxanthellae in the coral reef are responsible for producing zooxanthin, which protects them from intense sunlight.”

2. noun

A carotenoid pigment found in plants, algae, and cyanobacteria, particularly in the chloroplasts of green algae.

“Zooxanthin is an essential component of the photosynthetic apparatus in certain algae and cyanobacteria.”