Archaeocyathid
[ ahr-kee-oh-sahy-uh-thid, ahr-kee-uh- ]
/ ˌɑr ki oʊˈsaɪ ə θɪd, ɑrˌki ə- /
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noun
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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Words nearby Archaeocyathid
archaebacteria, archaebacterium, archaeo-, archaeoastronomy, archaeobotany, Archaeocyathid, archaeol., archaeological, archaeologist, archaeology, archaeomagnetism
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021