Usage: 2 forms in 4 verses
Form Translated As     In Verse(s)
σπονδείων libation bowls LXX.1Chr.28.17
σπονδεία libation bowls LXX.Exod.25.29LXX.Exod.37.16LXX.Num.4.7

Liddell-Scott-Jones

σπονδεῖον (spondeion) a libation bowl G:N-N

σπονδεῖον

(i.e. σκύφος), τό, cup from which the σπονδή was poured, [LXX+3rd c.BC+]; Ionic dialect σπονδήϊον [Refs]

__2 bowl for offerings, [Refs 1st c.AD+]
__3 a pouring-cup used by doctors, [Refs 1st c.AD+]
__II part of the νόμος Πυθικός, [Refs 2nd c.BC+]

LSJ Scripture Refs: LXX.Num.4.7