materiai
materiai is a Latin form of materia, meaning “material, matter; timber, wood; subject, theme”. It is the genitive singular feminine noun.
Found 42 times in the Latin texts on Socratos.
Where it is used
Lucretius, De Rerum Natura 1.249: discidio redeunt in corpora materiai.
All forms of materia (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.