symmetriis
symmetriis is a Latin form of symmetria, meaning “symmetry, proportion”. It is the ablative plural feminine noun or dative plural feminine noun.
Found 25 times in the Latin texts on Socratos.
Where it is used
Vitruvius, On Architecture 1.7.2: … ficiorum rationes aptae templis areae sunt distribuendae. De ipsis autem aedibus sacris faciundis et de earum symmetriis in tertio et quarto volumine reddam rationes, quia in secundo visum est mihi primum de materiae copiis, quae …
All forms of symmetria (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.