zooxanthella
noun
zo·o·xan·thel·la
| \ ˌzō-ə-zan-ˈthe-lə
\
\
plural zooxanthellae\ ˌzō-ə-zan-ˈthe-(ˌ)lē
\
\
Definition of zooxanthella
: any of various symbiotic dinoflagellates that live within the cells of other organisms (such as reef-building coral polyps)
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