Mesozoa

American  

[mez-uh-zoh-uh, mes-, mee-zuh-, -suh-] / ˌmɛz əˈzoʊ ə, ˌmɛs-, ˌmi zə-, -sə- /

noun

Zoology.

1. the phylum of invertebrates comprising the mesozoans, parasitic wormlike multicellular organisms sometimes considered to be intermediate in complexity between protozoans and metazoans.

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Etymology

Origin of Mesozoa

From New Latin, dating back to 1875–80; meso-, -zoa