columnarum
columnarum is a Latin form of columna, meaning “column, pillar”. It is the genitive plural feminine noun.
Found 70 times in the Latin texts on Socratos.
Where it is used
Cicero, In C. Verrem 2.1.134: Habonius, qui legem nosset—qua in lege numerus tantum columnarum traditur, perpendiculi mentio fit nulla—et qui non putaret sibi expedire ita accipere, ne eodem modo tradendu …
Vitruvius, On Architecture 3.5.14: Columnarum striae faciendae sunt XXIIII ita excavatae, uti norma in cavo striae cum fuerit coniecta, circumacta anconibu …
All forms of columna (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.