Receptaculites
noun
Re·cep·tac·u·li·tes
\ˌrēsepˌtakyəˈlīt(ˌ)ēz\
Definition of Receptaculites
: a genus (the type of the family Receptaculitidae) of Ordovician and Devonian calcareous fossils consisting of closely spaced plates or pillars that form a globose or discoidal mass — see sunflower coral
From the M-W Editors
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Origin and Etymology of receptaculites
New Latin, from receptaculum + -ites
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