Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
καδίω canteen LXX.1Sam.17.40
κάδιον canteen LXX.1Sam.17.49

Liddell-Scott-Jones

κάδιον (kadion) a canteen G:N-N

κάδιον-ιον [], τό,

diminutive of κάδιονος, [LXX+3rd c.BC+];= ὑδρία (Salam.), [Refs 5th c.AD+]: κάδιονδιον [Refs 2nd c.BC+] H.:—also κάδιονιν, ἔλαιον καὶ κάδιονιν [Refs 2nd c.AD+]

LSJ Scripture Refs: LXX.1Kgs.17.40