aristas
aristas is a Latin form of arista, meaning “awn, beard of an ear of grain; ear of grain; grain crop”. It is the accusative plural feminine noun.
Found 25 times in the Latin texts on Socratos.
Where it is used
Vergil, Eclogues 1.70: post aliquot mea regna videns mirabor aristas?
All forms of arista (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.