MesozoayoudaoicibaDictYouDict[Mesozoa 词源字典]
"With plural concord: a group of minute worms with no body cavity or organs other than reproductive cells, which are internal parasites of marine invertebrates and absorb dissolved nutrients directly from the host's tissues; (also mesozoa) worms of this group collectively", Late 19th cent.; earliest use found in Quarterly Journal of Microscopical Science. From meso- + -zoa, after French Mésozoaires.[Mesozoa etymology, Mesozoa origin, 英语词源]