[ ahr-kee-oh-sahy-uh-thid, ahr-kee-uh- ]

  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.

Origin of Archaeocyathid

<New Latin Archaeocyath(us) genus name (archaeo-archaeo- + Latin cyathus ladle <Greek kýathos) + -id2

Words Nearby Archaeocyathid Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023