Illustrated Companion to the Latin Dictionary/Cos

This article incorporates text from a publication now in the public domain: Rich, Anthony (1849). The illustrated companion to the Latin dictionary, and Greek lexicon. p. vi. OCLC 894670115. https://archive.org/details/illustratedcompa00rich. 

COS (ἀκόνη). A hone, whetstone, or grindstone; worked with water and oil (Plin. H. N. xxxvi. 47.), and by the same sort of machinery as now employed. The illustration (Cos/1.1), from an engraved gem, represents Cupid sharpening his arrows on a grindstone, exactly as described by Horace (Od. ii. 8. 15. ardentes acuens sagittas Cote cruenta).

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  Cos/1.1