Boyd’s Bible Dictionary:
(double rebellion). Symbol of Chaldea (Jer. 50:21).
Concise Bible Dictionary:
Symbolical name given to the country of the Chaldeans, signifying “double rebellion,” perhaps alluding to the double captivity of the Israelites by Chaldea (Jer. 50:21; compare Jer. 50:25).
Strong’s Dictionary of Hebrew Words:
Transliteration:
Mrathayim
Meaning:
dual of 4751 feminine; double bitterness; Merathajim, an epithet of Babylon
Jackson’s Dictionary of Scripture Proper Names:
double rebellion: double bitterness
Potts’ Bible Proper Names:
Double rebellion; double bitterness; great domination:―symbolical of Babylon, Jer. 50:21. {Gemina rebellio}