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Archaeocyathid: Meaning and Definition of
Ar•chae•o•cy•a•thid
Pronunciation: (är"kē-ō-sī'u-thid, är-kē"u-), [key]
— n.
- 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.
