Usage: 4 forms in 15 verses
Form Translated As     In Verse(s)
λουτήρων bathing tubs LXX.1Kgs.7.30
λουτήρεσ bathing tubs LXX.1Kgs.10.21
λουτήρασ bathing tubs LXX.2Chr.4.6 • LXX.2Chr.4.14
λουτήρα a bathing tub LXX.Exod.30.18
bathing tub LXX.Exod.30.28 • LXX.Exod.31.9 • LXX.Exod.35.16 • LXX.Exod.38.8 • LXX.Exod.39.39 • LXX.Exod.40.7 • LXX.Exod.40.11 • LXX.Exod.40.30 • LXX.Lev.8.11 • LXX.2Kgs.16.17

Liddell-Scott-Jones

λουτήρ (loutēr) a bathing tub G:N-M

λουτήρ-τήρ, ῆρος, ὁ,

washing or bathing-tub, [LXX+4th c.BC+]

LSJ Scripture Refs: LXX.Exod.30.18