βόρειον
From LSJ
ἀσκεῖν περὶ τὰ νοσήματα δύο, ὠφελεῖν ἢ μὴ βλάπτειν → strive, with regard to diseases, for two things — to do good, or to do no harm | as to diseases, make a habit of two things — to help, or at least, to do no harm
Russian (Dvoretsky)
βόρειον: τό
1 чаще pl. пора северных ветров Xen.: βορείων ὄντων или βορείοις Arst. при северных ветрах;
2 pl. северные области, север (ἐν βορείοις Arst.).