testium
testium is a Latin form of testis, meaning “witness”. It is the genitive plural masculine noun or genitive plural feminine noun.
Found 65 times in the Latin texts on Socratos.
Where it is used
Cicero, In C. Verrem 1.1.19: … sque me viderat narrabat. Aliis illud indignum, aliis ridiculum videbatur: ridiculum iis qui istius causam in testium fide, in criminum ratione, in iudicum potestate, non in comitiis consularibus positam arbitrabantur, indignum …
All forms of testis (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.