διήθησις
From LSJ
Ἐς δὲ τὰ ἔσχατα νουσήματα αἱ ἔσχαται θεραπεῖαι ἐς ἀκριβείην, κράτισται → But for extreme illnesses, extreme remedies, applied with severe exactitude, are the best (Hippocrates, Aphorism 6)
English (LSJ)
εως, ἡ,
A straining, percolation, Epicur.Ep.2p.45U., Thphr.CP6.1.1, Plu.Ant.3: pl., D.Chr.33.6; filtering of urine in kidneys, Aret.SD2.3; haemorrhage, κατὰ δ. Aët.15.10.