stereom

English

Noun

stereom (uncountable)

1. A calcium carbonate material which makes up the internal skeletons of echinoderms.
   • 1997 October, R[onald] L. Parsley, “The echinoderm classes Stylophora and Homoiostelea: non Calcichordata”, in The Paleontological Society Papers, volume 3, Cambridge, Cambridgeshire: Cambridge University Press, →DOI, →ISSN, →OCLC, page 230:

     Two genera, Lagynocystis and Iaekelocarpus possess ctenoid organs. These thin folded sheets of stereom are of unknown function.

Further reading

• stereom on Wikipedia.Wikipedia