1383, "plug used to stop the hole of a cask," probably from O.Fr. *espigot
(cf. Gascony dialect espigot
"core of a fruit, small ear of grain"), dim. of O.Prov. espiga
"ear of grain," from L. spica
"ear of grain" (see spike
(n.2)). Meaning "valve for controlling the flow of a liquid" is from 1530.