casside
casside is a Latin form of cassis, meaning “hollow/empty/devoid of, lacking; useless/fruitless/vain”. It is the ablative singular feminine noun.
Found 50 times in the Latin texts on Socratos.
Where it is used
Ovid, Metamorphoses 8.25: seu caput abdiderat cristata casside pennis,
Martial, Epigrammata 9.56.8: Casside dum liber Parthenopaeus erat.
All forms of cassis (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.