arachnactis

noun

ar·​ach·​nac·​tis

ˌaˌrakˈnaktə̇s

plural arachnactines

əˌrakˌnakˈtī(ˌ)nēz

: a free-swimming larva of certain actinians

Word History

Etymology

New Latin, from arachn- + Greek aktis ray

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