Archaeocyathid

American  

[ahr-kee-oh-sahy-uh-thid, ahr-kee-uh-] / ˌɑr ki oʊˈsaɪ ə θɪd, ɑrˌki ə- /

noun

1. one of the marine invertebrates of the extinct phylum Archaeocyatha, widely distributed during the Cambrian Period, having a limy, typically conical or cylindrical skeleton composed of sievelike inner and outer walls.

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Etymology

Origin of Archaeocyathid

< New Latin Archaeocyath ( us ) genus name ( archaeo- archaeo- + Latin cyathus ladle < Greek kýathos ) + -id ²