Definition of zooxanthella in English:

zooxanthella

noun

Biology
  • A yellowish-brown symbiotic dinoflagellate present in large numbers in the cytoplasm of many marine invertebrates.

    • ‘It is not known whether rugose corals had symbiotic photosymbiotic zooxanthellae as modern corals do.’
    • ‘The zooxanthellae in these corals are dinoflagellates, and it is suspected that there may be a relationship between their diversifications.’
    • ‘Both coral and sponge were sparse, and the former largely without color - giving symbiotic zooxanthellae.’
    • ‘The plants are tiny single-celled algae, the zooxanthellae or symbiotic dinoflagellates, that live within the tissues of corals in great numbers.’
    • ‘These zooxanthellae may be found in many marine invertebrates, including sponges, corals, jellyfish, and flatworms, as well as within protists, such as ciliates, foraminiferans, and colonial radiolarians.’

Origin

Late 19th century: modern Latin, from zoo- ‘of animals’ + Greek xanthos yellow + the diminutive suffix -ella.

Pronunciation:

zooxanthella

/ˌzuːə(ʊ)zanˈθɛlə/