ἐρυθρόδανον
From LSJ
τὸ γὰρ μυστήριον ἤδη ἐνεργεῖται τῆς ἀνομίας· μόνον ὁ κατέχων ἄρτι ἕως ἐκ μέσου γένηται. (2Thess 2:7) → For the mystery of lawlessness is already at work — just at work until the one who is now constraining it is taken out.
English (LSJ)
τό,=ἐρευθέδανον, Dsc.3.143 : ἐρυθρόδανος, ἡ, Plin. HN 24.94 (v.l.) ; cf. ἐρυθρύδανον.