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deltidium
noun
del·tid·i·um
Definition of deltidium
deltidia
\-dēə\1 : a plate partly or wholly closing the delthyrium of certain brachiopods —called also pseudodeltidium
2 : a pair of plates not homologous with the pseudodeltidium that performs the same function in other brachiopods —called also deltidial plates
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Origin and Etymology of deltidium
New Latin, from Greek delta + New Latin -idium
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