Lethaea Save Could not find Lethaeamque in Logeion dictionaries. Lethaeamque Proper-name noun: feminine accusative singular of Lethaea Lethaeamque Proper-name adjective: feminine accusative singular of Lethaeus See Lethaeamque in Morpho Lewis & Short Lēthaea, ae, f., the wife of Olĕnus, who, on account of her pride, was turned into stone, Ov. M. 10, 70.