τετράδιον
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)
τό, a
A guard of soldiers (normally consisting of four men), Ph.2.533, Act.Ap.12.4. II quaternion of parchment, POxy.2156.10 (iv/v A.D.), Tz.H.9.290; cf. τετράδειον.