I.Lat. funda (the ς being lost), a sling, Il.: metaph., σφενδόνας ἀπ᾽ εὐμέτρου with well-measured throw, as from a sling, Aesch.
2.the hoop of a ring in which the stone was set as in a sling, esp. the broader part round the stone, as in Lat. funda for pala annuli, Eur., Plat.