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deltidium

noun del·tid·i·um

Definition of deltidium

plural 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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