from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various yellow-green algae that live symbiotically within the cells of other organisms, such as those of certain radiolarians and marine invertebrates.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An animal of the genus Symbiodinium, a yellow dinoflagellate, notably found in coral reefs.
- n. Any golden-brown planktonic endosymbiont.
New Latin : zoo- + xanth(o)- + -ella, diminutive suff.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek ζῷον (zōon, "animal") + ξανθός (ksanthos, "yellow") (Wiktionary)