Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
τερατοσκόποσ an observer of signs LXX.Deut.18.11
τερατοσκόποι observers of signs LXX.Zech.3.8

Liddell-Scott-Jones

τερατοσκόπος (teratoskopos) an observer of signs G:N-M

τερατοσκόπος-σκόπος, ,

observer of τέρατα, soothsayer, diviner, [LXX+5th c.BC+]

LSJ Scripture Refs: LXX.Deut.18.11