Lexical Definition

‎φόβητρον‎ phóbētron (fob'-ay-tron) fearful thing ^G:N-N
neuter of a derivative of ‎φοβέω‎

fearful sight.

• a frightening thing, i.e. terrific portent

Abbott-Smith

φόβητρον (LTr., WH, -θρον), -ου, τό (< φοβέω), [in LXX: Is 19:17 (חָגָא) * ;]
that which causes fright, a terror: pl. (as always, exc. Is, l.c.), Lk 21:11 (Hipp., Plat.).†

Abbott-Smith References

Liddell-Scott-Jones

φόβητρον-ητρον, τό,

scarecrow, bugbear, terror, [LXX]: elsewhere always in plural terrors, [NT+5th c.BC+]; Τισιφόνης τὰ φ., probably tragic masks of the Furies, [Refs 1st c.AD+]

_{LSJ Scripture Refs: LXX.Isa.19.17 ☩ Luke.21.11}