deltidiumn.
/dɛlˈtɪdɪəm/ Conchology.
The triangular space, usually covered in by a horny shell or operculum, between the beak and the hinge of brachiopod shells.
ΚΠ
1851 G. F. Richardson Geol. (1855) viii. 232 The form and structure of the area and deltidium afford good generic characters.
1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 693 The groove is usually converted into a foramen by a ‘deltidium’ which consists of two calcareous pieces.
This entry has not yet been fully updated (first published 1895; most recently modified version published online June 2018).
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n.1851- twenty in the hundred
- twenty port
- twenty questions
- twenty thousand
- twenty to one
- twenty twenty-two port
- twenty twentytwo port
- twenty-bore
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- twenty-centimetre
- twenty-coloured
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- twenty-eight
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- twenty-eight-pounder
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- twenty-five
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- twenty-foot
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- twenty-footer
- twenty-four