deltidium

Borrowed from New Latin deltidium. By surface analysis, delta +‎ -idium.

• (Received Pronunciation) IPA^(key): /dɛlˈtɪdɪəm/

deltidium (plural deltidiums or deltidia)

1. (conchology, now rare) The triangular space under the beak of many brachiopod shells. [1851]

The terms is barely found in literature since the 19th century.

• delta

• “deltidium”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.

The Latinisation of *deltidion, formed in Latin from Ancient Greek elements: δέλτα (délta) +‎ -ίδιον (-ídion) = literally “little delta”. Unrelated to Byzantine Greek δελτίδιον (deltídion).

• (Classical Latin) IPA^(key): [dɛɫˈtɪ.di.ũː]
• (modern Italianate Ecclesiastical) IPA^(key): [delˈtiː.di.um]

deltidium n (genitive deltidiī or deltidī); second declension

1. (New Latin, conchology) deltidium [≤1836]

Second-declension noun (neuter).

¹Found in older Latin (until the Augustan Age).

• → English: deltidium