Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
εμπρόσθια front LXX.1Sam.5.4
εμπροσθίων front LXX.Exod.28.14

Liddell-Scott-Jones

ἐμπρόσθιος (emprosthios) in front G:N-N

ἐμπρόσθιος-ιος, ον,

fore, like{πρόσθιος}, of the feet of a quadruped, opposed to ὀπίσθιοι, . πόδες [Refs 5th c.BC+]; . τραύματα wounds in front, [Refs 1st c.BC+]

__II Astron., preceding in the daily motion of the heavens, [Refs 2nd c.AD+]