zooxanthella

[ zoh-uh-zan-thel-uh ]
/ ˌzoʊ ə zænˈθɛl ə /

noun, plural zo·o·xan·thel·lae [zoh-uh-zan-thel-ee]. /ˌzoʊ ə zænˈθɛl i/.

any of various symbiotic yellow-green or yellow–brown algae in the cytoplasm of certain radiolarians and marine invertebrates.

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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020